Sets the trace name. The trace name appears as the legend item and on hover.

Determines whether or not this trace is visible. If "legendonly", the trace is not drawn, but can appear as a legend item (provided that the legend itself is visible).

Determines whether or not an item corresponding to this trace is shown in the legend.

Sets the reference to a legend to show this trace in. References to these legends are "legend", "legend2", "legend3", etc. Settings for these legends are set in the layout, under `layout.legend`, `layout.legend2`, etc.

Sets the legend rank for this trace. Items and groups with smaller ranks are presented on top/left side while with "reversed" `legend.traceorder` they are on bottom/right side. The default legendrank is 1000, so that you can use ranks less than 1000 to place certain items before all unranked items, and ranks greater than 1000 to go after all unranked items. When having unranked or equal rank items shapes would be displayed after traces i.e. according to their order in data and layout.

Sets the legend group for this trace. Traces and shapes part of the same legend group hide/show at the same time when toggling legend items.

• font
  Parent: data[type=histogram].legendgrouptitle
  Type: named list containing one or more of the keys listed below.

  Sets this legend group's title font.

  • color
    Parent: data[type=histogram].legendgrouptitle.font
    Type: color
  • family
    Parent: data[type=histogram].legendgrouptitle.font
    Type: string

    HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

  • lineposition
    Parent: data[type=histogram].legendgrouptitle.font
    Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
    Examples: "under", "over", "under+over", "under+over+through", "none"
    Default: "none"

    Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

  • shadow
    Parent: data[type=histogram].legendgrouptitle.font
    Type: string
    Default: "none"

    Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

  • size
    Parent: data[type=histogram].legendgrouptitle.font
    Type: number greater than or equal to 1
  • style
    Parent: data[type=histogram].legendgrouptitle.font
    Type: enumerated , one of ( "normal" | "italic" )
    Default: "normal"

    Sets whether a font should be styled with a normal or italic face from its family.

  • textcase
    Parent: data[type=histogram].legendgrouptitle.font
    Type: enumerated , one of ( "normal" | "word caps" | "upper" | "lower" )
    Default: "normal"

    Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

  • variant
    Parent: data[type=histogram].legendgrouptitle.font
    Type: enumerated , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
    Default: "normal"

    Sets the variant of the font.

  • weight
    Parent: data[type=histogram].legendgrouptitle.font
    Type: integer between or equal to 1 and 1000
    Default: normal

    Sets the weight (or boldness) of the font.

• text
  Parent: data[type=histogram].legendgrouptitle
  Type: string
  Default: ""

  Sets the title of the legend group.

Sets the width (in px or fraction) of the legend for this trace.

Sets the opacity of the trace.

Assigns id labels to each datum. These ids for object constancy of data points during animation. Should be an array of strings, not numbers or any other type.

Sets the layer on which this trace is displayed, relative to other SVG traces on the same subplot. SVG traces with higher `zorder` appear in front of those with lower `zorder`.

Sets the sample data to be binned on the x axis.

Sets the sample data to be binned on the y axis.

Sets hover text elements associated with each bar. If a single string, the same string appears over all bars. If an array of string, the items are mapped in order to the this trace's coordinates.

Specifies the location of the `text`. "inside" positions `text` inside, next to the bar end (rotated and scaled if needed). "outside" positions `text` outside, next to the bar end (scaled if needed), unless there is another bar stacked on this one, then the text gets pushed inside. "auto" tries to position `text` inside the bar, but if the bar is too small and no bar is stacked on this one the text is moved outside. If "none", no text appears.

Template string used for rendering the information text that appear on points. Note that this will override `textinfo`. Variables are inserted using %{variable}, for example "y: %{y}". Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example "Price: %{y:$.2f}". https://github.com/d3/d3-format/tree/v1.4.5#d3-format for details on the formatting syntax. Dates are formatted using d3-time-format's syntax %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}". https://github.com/d3/d3-time-format/tree/v2.2.3#locale_format for details on the date formatting syntax. Every attributes that can be specified per-point (the ones that are `arrayOk: TRUE`) are available. Finally, the template string has access to variables `label` and `value`.

Same as `text`.

Determines which trace information appear on hover. If `none` or `skip` are set, no information is displayed upon hovering. But, if `none` is set, click and hover events are still fired.

Template string used for rendering the information that appear on hover box. Note that this will override `hoverinfo`. Variables are inserted using %{variable}, for example "y: %{y}" as well as %{xother}, {%_xother}, {%_xother_}, {%xother_}. When showing info for several points, "xother" will be added to those with different x positions from the first point. An underscore before or after "(x|y)other" will add a space on that side, only when this field is shown. Numbers are formatted using d3-format's syntax %{variable:d3-format}, for example "Price: %{y:$.2f}". https://github.com/d3/d3-format/tree/v1.4.5#d3-format for details on the formatting syntax. Dates are formatted using d3-time-format's syntax %{variable|d3-time-format}, for example "Day: %{2019-01-01|%A}". https://github.com/d3/d3-time-format/tree/v2.2.3#locale_format for details on the date formatting syntax. The variables available in `hovertemplate` are the ones emitted as event data described at this link https://plotly.com/javascript/plotlyjs-events/#event-data. Additionally, every attributes that can be specified per-point (the ones that are `arrayOk: TRUE`) are available. Finally, the template string has access to variable `binNumber` Anything contained in tag `<extra>` is displayed in the secondary box, for example "<extra>{fullData.name}</extra>". To hide the secondary box completely, use an empty tag `<extra></extra>`.

Sets the hover text formatting rulefor `x` using d3 formatting mini-languages which are very similar to those in Python. For numbers, see: https://github.com/d3/d3-format/tree/v1.4.5#d3-format. And for dates see: https://github.com/d3/d3-time-format/tree/v2.2.3#locale_format. We add two items to d3's date formatter: "%h" for half of the year as a decimal number as well as "%{n}f" for fractional seconds with n digits. For example, "2016-10-13 09:15:23.456" with tickformat "%H~%M~%S.%2f" would display "09~15~23.46"By default the values are formatted using `xaxis.hoverformat`.

Sets the hover text formatting rulefor `y` using d3 formatting mini-languages which are very similar to those in Python. For numbers, see: https://github.com/d3/d3-format/tree/v1.4.5#d3-format. And for dates see: https://github.com/d3/d3-time-format/tree/v2.2.3#locale_format. We add two items to d3's date formatter: "%h" for half of the year as a decimal number as well as "%{n}f" for fractional seconds with n digits. For example, "2016-10-13 09:15:23.456" with tickformat "%H~%M~%S.%2f" would display "09~15~23.46"By default the values are formatted using `yaxis.hoverformat`.

Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.

Assigns extra data each datum. This may be useful when listening to hover, click and selection events. Note that, "scatter" traces also appends customdata items in the markers DOM elements

Sets a reference between this trace's x coordinates and a 2D cartesian x axis. If "x" (the default value), the x coordinates refer to `layout.xaxis`. If "x2", the x coordinates refer to `layout.xaxis2`, and so on.

Sets a reference between this trace's y coordinates and a 2D cartesian y axis. If "y" (the default value), the y coordinates refer to `layout.yaxis`. If "y2", the y coordinates refer to `layout.yaxis2`, and so on.

Sets the orientation of the bars. With "v" ("h"), the value of the each bar spans along the vertical (horizontal).

Specifies the binning function used for this histogram trace. If "count", the histogram values are computed by counting the number of values lying inside each bin. If "sum", "avg", "min", "max", the histogram values are computed using the sum, the average, the minimum or the maximum of the values lying inside each bin respectively.

Specifies the type of normalization used for this histogram trace. If "", the span of each bar corresponds to the number of occurrences (i.e. the number of data points lying inside the bins). If "percent" / "probability", the span of each bar corresponds to the percentage / fraction of occurrences with respect to the total number of sample points (here, the sum of all bin HEIGHTS equals 100% / 1). If "density", the span of each bar corresponds to the number of occurrences in a bin divided by the size of the bin interval (here, the sum of all bin AREAS equals the total number of sample points). If "probability density", the area of each bar corresponds to the probability that an event will fall into the corresponding bin (here, the sum of all bin AREAS equals 1).

Set several traces linked to the same position axis or matching axes to the same alignmentgroup. This controls whether bars compute their positional range dependently or independently.

Set several traces linked to the same position axis or matching axes to the same offsetgroup where bars of the same position coordinate will line up.

Specifies the maximum number of desired bins. This value will be used in an algorithm that will decide the optimal bin size such that the histogram best visualizes the distribution of the data. Ignored if `xbins.size` is provided.

Specifies the maximum number of desired bins. This value will be used in an algorithm that will decide the optimal bin size such that the histogram best visualizes the distribution of the data. Ignored if `ybins.size` is provided.

Obsolete: since v1.42 each bin attribute is auto-determined separately and `autobinx` is not needed. However, we accept `autobinx: TRUE` or `FALSE` and will update `xbins` accordingly before deleting `autobinx` from the trace.

Obsolete: since v1.42 each bin attribute is auto-determined separately and `autobiny` is not needed. However, we accept `autobiny: TRUE` or `FALSE` and will update `ybins` accordingly before deleting `autobiny` from the trace.

Set a group of histogram traces which will have compatible bin settings. Note that traces on the same subplot and with the same "orientation" under `barmode` "stack", "relative" and "group" are forced into the same bingroup, Using `bingroup`, traces under `barmode` "overlay" and on different axes (of the same axis type) can have compatible bin settings. Note that histogram and histogram2d" trace can share the same `bingroup`

• end
  Parent: data[type=histogram].xbins
  Type: number or categorical coordinate string

  Sets the end value for the x axis bins. The last bin may not end exactly at this value, we increment the bin edge by `size` from `start` until we reach or exceed `end`. Defaults to the maximum data value. Like `start`, for dates use a date string, and for category data `end` is based on the category serial numbers.

• size
  Parent: data[type=histogram].xbins
  Type: number or categorical coordinate string

  Sets the size of each x axis bin. Default behavior: If `nbinsx` is 0 or omitted, we choose a nice round bin size such that the number of bins is about the same as the typical number of samples in each bin. If `nbinsx` is provided, we choose a nice round bin size giving no more than that many bins. For date data, use milliseconds or "M<n>" for months, as in `axis.dtick`. For category data, the number of categories to bin together (always defaults to 1). If multiple non-overlaying histograms share a subplot, the first explicit `size` is used and all others discarded. If no `size` is provided,the sample data from all traces is combined to determine `size` as described above.

• start
  Parent: data[type=histogram].xbins
  Type: number or categorical coordinate string

  Sets the starting value for the x axis bins. Defaults to the minimum data value, shifted down if necessary to make nice round values and to remove ambiguous bin edges. For example, if most of the data is integers we shift the bin edges 0.5 down, so a `size` of 5 would have a default `start` of -0.5, so it is clear that 0-4 are in the first bin, 5-9 in the second, but continuous data gets a start of 0 and bins [0,5), [5,10) etc. Dates behave similarly, and `start` should be a date string. For category data, `start` is based on the category serial numbers, and defaults to -0.5. If multiple non-overlaying histograms share a subplot, the first explicit `start` is used exactly and all others are shifted down (if necessary) to differ from that one by an integer number of bins.

• end
  Parent: data[type=histogram].ybins
  Type: number or categorical coordinate string

  Sets the end value for the y axis bins. The last bin may not end exactly at this value, we increment the bin edge by `size` from `start` until we reach or exceed `end`. Defaults to the maximum data value. Like `start`, for dates use a date string, and for category data `end` is based on the category serial numbers.

• size
  Parent: data[type=histogram].ybins
  Type: number or categorical coordinate string

  Sets the size of each y axis bin. Default behavior: If `nbinsy` is 0 or omitted, we choose a nice round bin size such that the number of bins is about the same as the typical number of samples in each bin. If `nbinsy` is provided, we choose a nice round bin size giving no more than that many bins. For date data, use milliseconds or "M<n>" for months, as in `axis.dtick`. For category data, the number of categories to bin together (always defaults to 1). If multiple non-overlaying histograms share a subplot, the first explicit `size` is used and all others discarded. If no `size` is provided,the sample data from all traces is combined to determine `size` as described above.

• start
  Parent: data[type=histogram].ybins
  Type: number or categorical coordinate string

  Sets the starting value for the y axis bins. Defaults to the minimum data value, shifted down if necessary to make nice round values and to remove ambiguous bin edges. For example, if most of the data is integers we shift the bin edges 0.5 down, so a `size` of 5 would have a default `start` of -0.5, so it is clear that 0-4 are in the first bin, 5-9 in the second, but continuous data gets a start of 0 and bins [0,5), [5,10) etc. Dates behave similarly, and `start` should be a date string. For category data, `start` is based on the category serial numbers, and defaults to -0.5. If multiple non-overlaying histograms share a subplot, the first explicit `start` is used exactly and all others are shifted down (if necessary) to differ from that one by an integer number of bins.

• autocolorscale
  Parent: data[type=histogram].marker
  Type: boolean
  Default: TRUE

  Determines whether the colorscale is a default palette (`autocolorscale: TRUE`) or the palette determined by `marker.colorscale`. Has an effect only if in `marker.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is TRUE, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.

• cauto
  Parent: data[type=histogram].marker
  Type: boolean
  Default: TRUE

  Determines whether or not the color domain is computed with respect to the input data (here in `marker.color`) or the bounds set in `marker.cmin` and `marker.cmax` Has an effect only if in `marker.color` is set to a numerical array. Defaults to `FALSE` when `marker.cmin` and `marker.cmax` are set by the user.

• cmax
  Parent: data[type=histogram].marker
  Type: number

  Sets the upper bound of the color domain. Has an effect only if in `marker.color` is set to a numerical array. Value should have the same units as in `marker.color` and if set, `marker.cmin` must be set as well.

• cmid
  Parent: data[type=histogram].marker
  Type: number

  Sets the mid-point of the color domain by scaling `marker.cmin` and/or `marker.cmax` to be equidistant to this point. Has an effect only if in `marker.color` is set to a numerical array. Value should have the same units as in `marker.color`. Has no effect when `marker.cauto` is `FALSE`.

• cmin
  Parent: data[type=histogram].marker
  Type: number

  Sets the lower bound of the color domain. Has an effect only if in `marker.color` is set to a numerical array. Value should have the same units as in `marker.color` and if set, `marker.cmax` must be set as well.

• color
  Parent: data[type=histogram].marker
  Type: color or array of colors

  Sets the marker color. It accepts either a specific color or an array of numbers that are mapped to the colorscale relative to the max and min values of the array or relative to `marker.cmin` and `marker.cmax` if set.

• coloraxis
  Parent: data[type=histogram].marker
  Type: subplotid

  Sets a reference to a shared color axis. References to these shared color axes are "coloraxis", "coloraxis2", "coloraxis3", etc. Settings for these shared color axes are set in the layout, under `layout.coloraxis`, `layout.coloraxis2`, etc. Note that multiple color scales can be linked to the same color axis.

• colorbar
  Parent: data[type=histogram].marker
  Type: named list containing one or more of the keys listed below.
  • bgcolor
    Parent: data[type=histogram].marker.colorbar
    Type: color
    Default: "rgba(0,0,0,0)"

    Sets the color of padded area.

  • bordercolor
    Parent: data[type=histogram].marker.colorbar
    Type: color
    Default: "#444"

    Sets the axis line color.

  • borderwidth
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 0

    Sets the width (in px) or the border enclosing this color bar.

  • dtick
    Parent: data[type=histogram].marker.colorbar
    Type: number or categorical coordinate string

    Sets the step in-between ticks on this axis. Use with `tick0`. Must be a positive number, or special strings available to "log" and "date" axes. If the axis `type` is "log", then ticks are set every 10^(n"dtick) where n is the tick number. For example, to set a tick mark at 1, 10, 100, 1000, ... set dtick to 1. To set tick marks at 1, 100, 10000, ... set dtick to 2. To set tick marks at 1, 5, 25, 125, 625, 3125, ... set dtick to log_10(5), or 0.69897000433. "log" has several special values; "L<f>", where `f` is a positive number, gives ticks linearly spaced in value (but not position). For example `tick0` = 0.1, `dtick` = "L0.5" will put ticks at 0.1, 0.6, 1.1, 1.6 etc. To show powers of 10 plus small digits between, use "D1" (all digits) or "D2" (only 2 and 5). `tick0` is ignored for "D1" and "D2". If the axis `type` is "date", then you must convert the time to milliseconds. For example, to set the interval between ticks to one day, set `dtick` to 86400000.0. "date" also has special values "M<n>" gives ticks spaced by a number of months. `n` must be a positive integer. To set ticks on the 15th of every third month, set `tick0` to "2000-01-15" and `dtick` to "M3". To set ticks every 4 years, set `dtick` to "M48"

  • exponentformat
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "none" | "e" | "E" | "power" | "SI" | "B" )
    Default: "B"

    Determines a formatting rule for the tick exponents. For example, consider the number 1,000,000,000. If "none", it appears as 1,000,000,000. If "e", 1e+9. If "E", 1E+9. If "power", 1x10^9 (with 9 in a super script). If "SI", 1G. If "B", 1B.

  • labelalias
    Parent: data[type=histogram].marker.colorbar
    Type: number or categorical coordinate string

    Replacement text for specific tick or hover labels. For example using {US: 'USA', CA: 'Canada'} changes US to USA and CA to Canada. The labels we would have shown must match the keys exactly, after adding any tickprefix or ticksuffix. For negative numbers the minus sign symbol used (U+2212) is wider than the regular ascii dash. That means you need to use −1 instead of -1. labelalias can be used with any axis type, and both keys (if needed) and values (if desired) can include html-like tags or MathJax.

  • len
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 1

    Sets the length of the color bar This measure excludes the padding of both ends. That is, the color bar length is this length minus the padding on both ends.

  • lenmode
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "fraction" | "pixels" )
    Default: "fraction"

    Determines whether this color bar's length (i.e. the measure in the color variation direction) is set in units of plot "fraction" or in "pixels. Use `len` to set the value.

  • minexponent
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 3

    Hide SI prefix for 10^n if |n| is below this number. This only has an effect when `tickformat` is "SI" or "B".

  • nticks
    Parent: data[type=histogram].marker.colorbar
    Type: integer greater than or equal to 0
    Default: 0

    Specifies the maximum number of ticks for the particular axis. The actual number of ticks will be chosen automatically to be less than or equal to `nticks`. Has an effect only if `tickmode` is set to "auto".

  • orientation
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "h" | "v" )
    Default: "v"

    Sets the orientation of the colorbar.

  • outlinecolor
    Parent: data[type=histogram].marker.colorbar
    Type: color
    Default: "#444"

    Sets the axis line color.

  • outlinewidth
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 1

    Sets the width (in px) of the axis line.

  • separatethousands
    Parent: data[type=histogram].marker.colorbar
    Type: boolean

    If "TRUE", even 4-digit integers are separated

  • showexponent
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "all" | "first" | "last" | "none" )
    Default: "all"

    If "all", all exponents are shown besides their significands. If "first", only the exponent of the first tick is shown. If "last", only the exponent of the last tick is shown. If "none", no exponents appear.

  • showticklabels
    Parent: data[type=histogram].marker.colorbar
    Type: boolean
    Default: TRUE

    Determines whether or not the tick labels are drawn.

  • showtickprefix
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "all" | "first" | "last" | "none" )
    Default: "all"

    If "all", all tick labels are displayed with a prefix. If "first", only the first tick is displayed with a prefix. If "last", only the last tick is displayed with a suffix. If "none", tick prefixes are hidden.

  • showticksuffix
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "all" | "first" | "last" | "none" )
    Default: "all"

    Same as `showtickprefix` but for tick suffixes.

  • thickness
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 30

    Sets the thickness of the color bar This measure excludes the size of the padding, ticks and labels.

  • thicknessmode
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "fraction" | "pixels" )
    Default: "pixels"

    Determines whether this color bar's thickness (i.e. the measure in the constant color direction) is set in units of plot "fraction" or in "pixels". Use `thickness` to set the value.

  • tick0
    Parent: data[type=histogram].marker.colorbar
    Type: number or categorical coordinate string

    Sets the placement of the first tick on this axis. Use with `dtick`. If the axis `type` is "log", then you must take the log of your starting tick (e.g. to set the starting tick to 100, set the `tick0` to 2) except when `dtick`="L<f>" (see `dtick` for more info). If the axis `type` is "date", it should be a date string, like date data. If the axis `type` is "category", it should be a number, using the scale where each category is assigned a serial number from zero in the order it appears.

  • tickangle
    Parent: data[type=histogram].marker.colorbar
    Type: angle
    Default: "auto"

    Sets the angle of the tick labels with respect to the horizontal. For example, a `tickangle` of -90 draws the tick labels vertically.

  • tickcolor
    Parent: data[type=histogram].marker.colorbar
    Type: color
    Default: "#444"

    Sets the tick color.

  • tickfont
    Parent: data[type=histogram].marker.colorbar
    Type: named list containing one or more of the keys listed below.

    Sets the color bar's tick label font

    • color
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: color
    • family
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: string

      HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

    • lineposition
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
      Examples: "under", "over", "under+over", "under+over+through", "none"
      Default: "none"

      Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

    • shadow
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: string
      Default: "none"

      Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

    • size
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: number greater than or equal to 1
    • style
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: enumerated , one of ( "normal" | "italic" )
      Default: "normal"

      Sets whether a font should be styled with a normal or italic face from its family.

    • textcase
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: enumerated , one of ( "normal" | "word caps" | "upper" | "lower" )
      Default: "normal"

      Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

    • variant
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: enumerated , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
      Default: "normal"

      Sets the variant of the font.

    • weight
      Parent: data[type=histogram].marker.colorbar.tickfont
      Type: integer between or equal to 1 and 1000
      Default: normal

      Sets the weight (or boldness) of the font.

  • tickformat
    Parent: data[type=histogram].marker.colorbar
    Type: string
    Default: ""

    Sets the tick label formatting rule using d3 formatting mini-languages which are very similar to those in Python. For numbers, see: https://github.com/d3/d3-format/tree/v1.4.5#d3-format. And for dates see: https://github.com/d3/d3-time-format/tree/v2.2.3#locale_format. We add two items to d3's date formatter: "%h" for half of the year as a decimal number as well as "%{n}f" for fractional seconds with n digits. For example, "2016-10-13 09:15:23.456" with tickformat "%H~%M~%S.%2f" would display "09~15~23.46"

  • tickformatstops
    Parent: data[type=histogram].marker.colorbar
    Type: list of named list where each named list has one or more of the keys listed below.
    • dtickrange
      Parent: data[type=histogram].marker.colorbar.tickformatstops[]
      Type: list

      range ["min", "max"], where "min", "max" - dtick values which describe some zoom level, it is possible to omit "min" or "max" value by passing "null"

    • enabled
      Parent: data[type=histogram].marker.colorbar.tickformatstops[]
      Type: boolean
      Default: TRUE

      Determines whether or not this stop is used. If `FALSE`, this stop is ignored even within its `dtickrange`.

    • name
      Parent: data[type=histogram].marker.colorbar.tickformatstops[]
      Type: string

      When used in a template, named items are created in the output figure in addition to any items the figure already has in this array. You can modify these items in the output figure by making your own item with `templateitemname` matching this `name` alongside your modifications (including `visible: FALSE` or `enabled: FALSE` to hide it). Has no effect outside of a template.

    • templateitemname
      Parent: data[type=histogram].marker.colorbar.tickformatstops[]
      Type: string

      Used to refer to a named item in this array in the template. Named items from the template will be created even without a matching item in the input figure, but you can modify one by making an item with `templateitemname` matching its `name`, alongside your modifications (including `visible: FALSE` or `enabled: FALSE` to hide it). If there is no template or no matching item, this item will be hidden unless you explicitly show it with `visible: TRUE`.

    • value
      Parent: data[type=histogram].marker.colorbar.tickformatstops[]
      Type: string
      Default: ""

      string - dtickformat for described zoom level, the same as "tickformat"

  • ticklabeloverflow
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "allow" | "hide past div" | "hide past domain" )

    Determines how we handle tick labels that would overflow either the graph div or the domain of the axis. The default value for inside tick labels is "hide past domain". In other cases the default is "hide past div".

  • ticklabelposition
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "outside" | "inside" | "outside top" | "inside top" | "outside left" | "inside left" | "outside right" | "inside right" | "outside bottom" | "inside bottom" )
    Default: "outside"

    Determines where tick labels are drawn relative to the ticks. Left and right options are used when `orientation` is "h", top and bottom when `orientation` is "v".

  • ticklabelstep
    Parent: data[type=histogram].marker.colorbar
    Type: integer greater than or equal to 1
    Default: 1

    Sets the spacing between tick labels as compared to the spacing between ticks. A value of 1 (default) means each tick gets a label. A value of 2 means shows every 2nd label. A larger value n means only every nth tick is labeled. `tick0` determines which labels are shown. Not implemented for axes with `type` "log" or "multicategory", or when `tickmode` is "array".

  • ticklen
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 5

    Sets the tick length (in px).

  • tickmode
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "auto" | "linear" | "array" )

    Sets the tick mode for this axis. If "auto", the number of ticks is set via `nticks`. If "linear", the placement of the ticks is determined by a starting position `tick0` and a tick step `dtick` ("linear" is the default value if `tick0` and `dtick` are provided). If "array", the placement of the ticks is set via `tickvals` and the tick text is `ticktext`. ("array" is the default value if `tickvals` is provided).

  • tickprefix
    Parent: data[type=histogram].marker.colorbar
    Type: string
    Default: ""

    Sets a tick label prefix.

  • ticks
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "outside" | "inside" | "" )
    Default: ""

    Determines whether ticks are drawn or not. If "", this axis' ticks are not drawn. If "outside" ("inside"), this axis' are drawn outside (inside) the axis lines.

  • ticksuffix
    Parent: data[type=histogram].marker.colorbar
    Type: string
    Default: ""

    Sets a tick label suffix.

  • ticktext
    Parent: data[type=histogram].marker.colorbar
    Type: dataframe column, list, vector

    Sets the text displayed at the ticks position via `tickvals`. Only has an effect if `tickmode` is set to "array". Used with `tickvals`.

  • tickvals
    Parent: data[type=histogram].marker.colorbar
    Type: dataframe column, list, vector

    Sets the values at which ticks on this axis appear. Only has an effect if `tickmode` is set to "array". Used with `ticktext`.

  • tickwidth
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 1

    Sets the tick width (in px).

  • title
    Parent: data[type=histogram].marker.colorbar
    Type: named list containing one or more of the keys listed below.
    • font
      Parent: data[type=histogram].marker.colorbar.title
      Type: named list containing one or more of the keys listed below.

      Sets this color bar's title font. Note that the title's font used to be set by the now deprecated `titlefont` attribute.

      • color
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: color
      • family
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: string

        HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

      • lineposition
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
        Examples: "under", "over", "under+over", "under+over+through", "none"
        Default: "none"

        Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

      • shadow
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: string
        Default: "none"

        Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

      • size
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: number greater than or equal to 1
      • style
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: enumerated , one of ( "normal" | "italic" )
        Default: "normal"

        Sets whether a font should be styled with a normal or italic face from its family.

      • textcase
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: enumerated , one of ( "normal" | "word caps" | "upper" | "lower" )
        Default: "normal"

        Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

      • variant
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: enumerated , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
        Default: "normal"

        Sets the variant of the font.

      • weight
        Parent: data[type=histogram].marker.colorbar.title.font
        Type: integer between or equal to 1 and 1000
        Default: normal

        Sets the weight (or boldness) of the font.

    • side
      Parent: data[type=histogram].marker.colorbar.title
      Type: enumerated , one of ( "right" | "top" | "bottom" )

      Determines the location of color bar's title with respect to the color bar. Defaults to "top" when `orientation` if "v" and defaults to "right" when `orientation` if "h". Note that the title's location used to be set by the now deprecated `titleside` attribute.

    • text
      Parent: data[type=histogram].marker.colorbar.title
      Type: string

      Sets the title of the color bar. Note that before the existence of `title.text`, the title's contents used to be defined as the `title` attribute itself. This behavior has been deprecated.

  • x
    Parent: data[type=histogram].marker.colorbar
    Type: number

    Sets the x position with respect to `xref` of the color bar (in plot fraction). When `xref` is "paper", defaults to 1.02 when `orientation` is "v" and 0.5 when `orientation` is "h". When `xref` is "container", defaults to "1" when `orientation` is "v" and 0.5 when `orientation` is "h". Must be between "0" and "1" if `xref` is "container" and between "-2" and "3" if `xref` is "paper".

  • xanchor
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "left" | "center" | "right" )

    Sets this color bar's horizontal position anchor. This anchor binds the `x` position to the "left", "center" or "right" of the color bar. Defaults to "left" when `orientation` is "v" and "center" when `orientation` is "h".

  • xpad
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 10

    Sets the amount of padding (in px) along the x direction.

  • xref
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "container" | "paper" )
    Default: "paper"

    Sets the container `x` refers to. "container" spans the entire `width` of the plot. "paper" refers to the width of the plotting area only.

  • y
    Parent: data[type=histogram].marker.colorbar
    Type: number

    Sets the y position with respect to `yref` of the color bar (in plot fraction). When `yref` is "paper", defaults to 0.5 when `orientation` is "v" and 1.02 when `orientation` is "h". When `yref` is "container", defaults to 0.5 when `orientation` is "v" and 1 when `orientation` is "h". Must be between "0" and "1" if `yref` is "container" and between "-2" and "3" if `yref` is "paper".

  • yanchor
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "top" | "middle" | "bottom" )

    Sets this color bar's vertical position anchor This anchor binds the `y` position to the "top", "middle" or "bottom" of the color bar. Defaults to "middle" when `orientation` is "v" and "bottom" when `orientation` is "h".

  • ypad
    Parent: data[type=histogram].marker.colorbar
    Type: number greater than or equal to 0
    Default: 10

    Sets the amount of padding (in px) along the y direction.

  • yref
    Parent: data[type=histogram].marker.colorbar
    Type: enumerated , one of ( "container" | "paper" )
    Default: "paper"

    Sets the container `y` refers to. "container" spans the entire `height` of the plot. "paper" refers to the height of the plotting area only.

• colorscale
  Parent: data[type=histogram].marker
  Type: colorscale

  Sets the colorscale. Has an effect only if in `marker.color` is set to a numerical array. The colorscale must be an array containing arrays mapping a normalized value to an rgb, rgba, hex, hsl, hsv, or named color string. At minimum, a mapping for the lowest (0) and highest (1) values are required. For example, `[[0, 'rgb(0,0,255)'], [1, 'rgb(255,0,0)']]`. To control the bounds of the colorscale in color space, use `marker.cmin` and `marker.cmax`. Alternatively, `colorscale` may be a palette name string of the following list: Blackbody,Bluered,Blues,Cividis,Earth,Electric,Greens,Greys,Hot,Jet,Picnic,Portland,Rainbow,RdBu,Reds,Viridis,YlGnBu,YlOrRd.

• cornerradius
  Parent: data[type=histogram].marker
  Type: number or categorical coordinate string

  Sets the rounding of corners. May be an integer number of pixels, or a percentage of bar width (as a string ending in %). Defaults to `layout.barcornerradius`. In stack or relative barmode, the first trace to set cornerradius is used for the whole stack.

• line
  Parent: data[type=histogram].marker
  Type: named list containing one or more of the keys listed below.
  • autocolorscale
    Parent: data[type=histogram].marker.line
    Type: boolean
    Default: TRUE

    Determines whether the colorscale is a default palette (`autocolorscale: TRUE`) or the palette determined by `marker.line.colorscale`. Has an effect only if in `marker.line.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is TRUE, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.

  • cauto
    Parent: data[type=histogram].marker.line
    Type: boolean
    Default: TRUE

    Determines whether or not the color domain is computed with respect to the input data (here in `marker.line.color`) or the bounds set in `marker.line.cmin` and `marker.line.cmax` Has an effect only if in `marker.line.color` is set to a numerical array. Defaults to `FALSE` when `marker.line.cmin` and `marker.line.cmax` are set by the user.

  • cmax
    Parent: data[type=histogram].marker.line
    Type: number

    Sets the upper bound of the color domain. Has an effect only if in `marker.line.color` is set to a numerical array. Value should have the same units as in `marker.line.color` and if set, `marker.line.cmin` must be set as well.

  • cmid
    Parent: data[type=histogram].marker.line
    Type: number

    Sets the mid-point of the color domain by scaling `marker.line.cmin` and/or `marker.line.cmax` to be equidistant to this point. Has an effect only if in `marker.line.color` is set to a numerical array. Value should have the same units as in `marker.line.color`. Has no effect when `marker.line.cauto` is `FALSE`.

  • cmin
    Parent: data[type=histogram].marker.line
    Type: number

    Sets the lower bound of the color domain. Has an effect only if in `marker.line.color` is set to a numerical array. Value should have the same units as in `marker.line.color` and if set, `marker.line.cmax` must be set as well.

  • color
    Parent: data[type=histogram].marker.line
    Type: color or array of colors

    Sets the marker.line color. It accepts either a specific color or an array of numbers that are mapped to the colorscale relative to the max and min values of the array or relative to `marker.line.cmin` and `marker.line.cmax` if set.

  • coloraxis
    Parent: data[type=histogram].marker.line
    Type: subplotid

    Sets a reference to a shared color axis. References to these shared color axes are "coloraxis", "coloraxis2", "coloraxis3", etc. Settings for these shared color axes are set in the layout, under `layout.coloraxis`, `layout.coloraxis2`, etc. Note that multiple color scales can be linked to the same color axis.

  • colorscale
    Parent: data[type=histogram].marker.line
    Type: colorscale

    Sets the colorscale. Has an effect only if in `marker.line.color` is set to a numerical array. The colorscale must be an array containing arrays mapping a normalized value to an rgb, rgba, hex, hsl, hsv, or named color string. At minimum, a mapping for the lowest (0) and highest (1) values are required. For example, `[[0, 'rgb(0,0,255)'], [1, 'rgb(255,0,0)']]`. To control the bounds of the colorscale in color space, use `marker.line.cmin` and `marker.line.cmax`. Alternatively, `colorscale` may be a palette name string of the following list: Blackbody,Bluered,Blues,Cividis,Earth,Electric,Greens,Greys,Hot,Jet,Picnic,Portland,Rainbow,RdBu,Reds,Viridis,YlGnBu,YlOrRd.

  • reversescale
    Parent: data[type=histogram].marker.line
    Type: boolean

    Reverses the color mapping if TRUE. Has an effect only if in `marker.line.color` is set to a numerical array. If TRUE, `marker.line.cmin` will correspond to the last color in the array and `marker.line.cmax` will correspond to the first color.

  • width
    Parent: data[type=histogram].marker.line
    Type: number or array of numbers greater than or equal to 0
    Default: 0

    Sets the width (in px) of the lines bounding the marker points.

• opacity
  Parent: data[type=histogram].marker
  Type: number or array of numbers between or equal to 0 and 1
  Default: 1

  Sets the opacity of the bars.

• pattern
  Parent: data[type=histogram].marker
  Type: named list containing one or more of the keys listed below.

  Sets the pattern within the marker.

  • bgcolor
    Parent: data[type=histogram].marker.pattern
    Type: color or array of colors

    When there is no colorscale sets the color of background pattern fill. Defaults to a `marker.color` background when `fillmode` is "overlay". Otherwise, defaults to a transparent background.

  • fgcolor
    Parent: data[type=histogram].marker.pattern
    Type: color or array of colors

    When there is no colorscale sets the color of foreground pattern fill. Defaults to a `marker.color` background when `fillmode` is "replace". Otherwise, defaults to dark grey or white to increase contrast with the `bgcolor`.

  • fgopacity
    Parent: data[type=histogram].marker.pattern
    Type: number between or equal to 0 and 1

    Sets the opacity of the foreground pattern fill. Defaults to a 0.5 when `fillmode` is "overlay". Otherwise, defaults to 1.

  • fillmode
    Parent: data[type=histogram].marker.pattern
    Type: enumerated , one of ( "replace" | "overlay" )
    Default: "replace"

    Determines whether `marker.color` should be used as a default to `bgcolor` or a `fgcolor`.

  • shape
    Parent: data[type=histogram].marker.pattern
    Type: enumerated or array of enumerateds , one of ( "" | "/" | "\" | "x" | "-" | "|" | "+" | "." )
    Default: ""

    Sets the shape of the pattern fill. By default, no pattern is used for filling the area.

  • size
    Parent: data[type=histogram].marker.pattern
    Type: number or array of numbers greater than or equal to 0
    Default: 8

    Sets the size of unit squares of the pattern fill in pixels, which corresponds to the interval of repetition of the pattern.

  • solidity
    Parent: data[type=histogram].marker.pattern
    Type: number or array of numbers between or equal to 0 and 1
    Default: 0.3

    Sets the solidity of the pattern fill. Solidity is roughly the fraction of the area filled by the pattern. Solidity of 0 shows only the background color without pattern and solidty of 1 shows only the foreground color without pattern.

• reversescale
  Parent: data[type=histogram].marker
  Type: boolean

  Reverses the color mapping if TRUE. Has an effect only if in `marker.color` is set to a numerical array. If TRUE, `marker.cmin` will correspond to the last color in the array and `marker.cmax` will correspond to the first color.

• showscale
  Parent: data[type=histogram].marker
  Type: boolean

  Determines whether or not a colorbar is displayed for this trace. Has an effect only if in `marker.color` is set to a numerical array.

Sets the angle of the tick labels with respect to the bar. For example, a `tickangle` of -90 draws the tick labels vertically. With "auto" the texts may automatically be rotated to fit with the maximum size in bars.

Sets the text font.

• color
  Parent: data[type=histogram].textfont
  Type: color
• family
  Parent: data[type=histogram].textfont
  Type: string

  HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

• lineposition
  Parent: data[type=histogram].textfont
  Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
  Examples: "under", "over", "under+over", "under+over+through", "none"
  Default: "none"

  Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

• shadow
  Parent: data[type=histogram].textfont
  Type: string
  Default: "none"

  Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

• size
  Parent: data[type=histogram].textfont
  Type: number greater than or equal to 1
• style
  Parent: data[type=histogram].textfont
  Type: enumerated , one of ( "normal" | "italic" )
  Default: "normal"

  Sets whether a font should be styled with a normal or italic face from its family.

• textcase
  Parent: data[type=histogram].textfont
  Type: enumerated , one of ( "normal" | "word caps" | "upper" | "lower" )
  Default: "normal"

  Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

• variant
  Parent: data[type=histogram].textfont
  Type: enumerated , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
  Default: "normal"

  Sets the variant of the font.

• weight
  Parent: data[type=histogram].textfont
  Type: integer between or equal to 1 and 1000
  Default: normal

  Sets the weight (or boldness) of the font.

• array
  Parent: data[type=histogram].error_x
  Type: dataframe column, list, vector

  Sets the data corresponding the length of each error bar. Values are plotted relative to the underlying data.

• arrayminus
  Parent: data[type=histogram].error_x
  Type: dataframe column, list, vector

  Sets the data corresponding the length of each error bar in the bottom (left) direction for vertical (horizontal) bars Values are plotted relative to the underlying data.

• color
  Parent: data[type=histogram].error_x
  Type: color

  Sets the stoke color of the error bars.

• copy_ystyle
  Parent: data[type=histogram].error_x
  Type: boolean
• symmetric
  Parent: data[type=histogram].error_x
  Type: boolean

  Determines whether or not the error bars have the same length in both direction (top/bottom for vertical bars, left/right for horizontal bars.

• thickness
  Parent: data[type=histogram].error_x
  Type: number greater than or equal to 0
  Default: 2

  Sets the thickness (in px) of the error bars.

• traceref
  Parent: data[type=histogram].error_x
  Type: integer greater than or equal to 0
  Default: 0
• tracerefminus
  Parent: data[type=histogram].error_x
  Type: integer greater than or equal to 0
  Default: 0
• type
  Parent: data[type=histogram].error_x
  Type: enumerated , one of ( "percent" | "constant" | "sqrt" | "data" )

  Determines the rule used to generate the error bars. If "constant`, the bar lengths are of a constant value. Set this constant in `value`. If "percent", the bar lengths correspond to a percentage of underlying data. Set this percentage in `value`. If "sqrt", the bar lengths correspond to the square of the underlying data. If "data", the bar lengths are set with data set `array`.

• value
  Parent: data[type=histogram].error_x
  Type: number greater than or equal to 0
  Default: 10

  Sets the value of either the percentage (if `type` is set to "percent") or the constant (if `type` is set to "constant") corresponding to the lengths of the error bars.

• valueminus
  Parent: data[type=histogram].error_x
  Type: number greater than or equal to 0
  Default: 10

  Sets the value of either the percentage (if `type` is set to "percent") or the constant (if `type` is set to "constant") corresponding to the lengths of the error bars in the bottom (left) direction for vertical (horizontal) bars

• visible
  Parent: data[type=histogram].error_x
  Type: boolean

  Determines whether or not this set of error bars is visible.

• width
  Parent: data[type=histogram].error_x
  Type: number greater than or equal to 0

  Sets the width (in px) of the cross-bar at both ends of the error bars.

• array
  Parent: data[type=histogram].error_y
  Type: dataframe column, list, vector

  Sets the data corresponding the length of each error bar. Values are plotted relative to the underlying data.

• arrayminus
  Parent: data[type=histogram].error_y
  Type: dataframe column, list, vector

  Sets the data corresponding the length of each error bar in the bottom (left) direction for vertical (horizontal) bars Values are plotted relative to the underlying data.

• color
  Parent: data[type=histogram].error_y
  Type: color

  Sets the stoke color of the error bars.

• symmetric
  Parent: data[type=histogram].error_y
  Type: boolean

  Determines whether or not the error bars have the same length in both direction (top/bottom for vertical bars, left/right for horizontal bars.

• thickness
  Parent: data[type=histogram].error_y
  Type: number greater than or equal to 0
  Default: 2

  Sets the thickness (in px) of the error bars.

• traceref
  Parent: data[type=histogram].error_y
  Type: integer greater than or equal to 0
  Default: 0
• tracerefminus
  Parent: data[type=histogram].error_y
  Type: integer greater than or equal to 0
  Default: 0
• type
  Parent: data[type=histogram].error_y
  Type: enumerated , one of ( "percent" | "constant" | "sqrt" | "data" )

  Determines the rule used to generate the error bars. If "constant`, the bar lengths are of a constant value. Set this constant in `value`. If "percent", the bar lengths correspond to a percentage of underlying data. Set this percentage in `value`. If "sqrt", the bar lengths correspond to the square of the underlying data. If "data", the bar lengths are set with data set `array`.

• value
  Parent: data[type=histogram].error_y
  Type: number greater than or equal to 0
  Default: 10

  Sets the value of either the percentage (if `type` is set to "percent") or the constant (if `type` is set to "constant") corresponding to the lengths of the error bars.

• valueminus
  Parent: data[type=histogram].error_y
  Type: number greater than or equal to 0
  Default: 10

  Sets the value of either the percentage (if `type` is set to "percent") or the constant (if `type` is set to "constant") corresponding to the lengths of the error bars in the bottom (left) direction for vertical (horizontal) bars

• visible
  Parent: data[type=histogram].error_y
  Type: boolean

  Determines whether or not this set of error bars is visible.

• width
  Parent: data[type=histogram].error_y
  Type: number greater than or equal to 0

  Sets the width (in px) of the cross-bar at both ends of the error bars.

Array containing integer indices of selected points. Has an effect only for traces that support selections. Note that an empty array means an empty selection where the `unselected` are turned on for all points, whereas, any other non-array values means no selection all where the `selected` and `unselected` styles have no effect.

• marker
  Parent: data[type=histogram].selected
  Type: named list containing one or more of the keys listed below.
  • color
    Parent: data[type=histogram].selected.marker
    Type: color

    Sets the marker color of selected points.

  • opacity
    Parent: data[type=histogram].selected.marker
    Type: number between or equal to 0 and 1

    Sets the marker opacity of selected points.

• textfont
  Parent: data[type=histogram].selected
  Type: named list containing one or more of the keys listed below.
  • color
    Parent: data[type=histogram].selected.textfont
    Type: color

    Sets the text font color of selected points.

• marker
  Parent: data[type=histogram].unselected
  Type: named list containing one or more of the keys listed below.
  • color
    Parent: data[type=histogram].unselected.marker
    Type: color

    Sets the marker color of unselected points, applied only when a selection exists.

  • opacity
    Parent: data[type=histogram].unselected.marker
    Type: number between or equal to 0 and 1

    Sets the marker opacity of unselected points, applied only when a selection exists.

• textfont
  Parent: data[type=histogram].unselected
  Type: named list containing one or more of the keys listed below.
  • color
    Parent: data[type=histogram].unselected.textfont
    Type: color

    Sets the text font color of unselected points, applied only when a selection exists.

Determines whether the text nodes are clipped about the subplot axes. To show the text nodes above axis lines and tick labels, make sure to set `xaxis.layer` and `yaxis.layer` to "below traces".

Constrain the size of text inside or outside a bar to be no larger than the bar itself.

• currentbin
  Parent: data[type=histogram].cumulative
  Type: enumerated , one of ( "include" | "exclude" | "half" )
  Default: "include"

  Only applies if cumulative is enabled. Sets whether the current bin is included, excluded, or has half of its value included in the current cumulative value. "include" is the default for compatibility with various other tools, however it introduces a half-bin bias to the results. "exclude" makes the opposite half-bin bias, and "half" removes it.

• direction
  Parent: data[type=histogram].cumulative
  Type: enumerated , one of ( "increasing" | "decreasing" )
  Default: "increasing"

  Only applies if cumulative is enabled. If "increasing" (default) we sum all prior bins, so the result increases from left to right. If "decreasing" we sum later bins so the result decreases from left to right.

• enabled
  Parent: data[type=histogram].cumulative
  Type: boolean

  If TRUE, display the cumulative distribution by summing the binned values. Use the `direction` and `centralbin` attributes to tune the accumulation method. Note: in this mode, the "density" `histnorm` settings behave the same as their equivalents without "density": "" and "density" both rise to the number of data points, and "probability" and "probability density" both rise to the number of sample points.

• align
  Parent: data[type=histogram].hoverlabel
  Type: enumerated or array of enumerateds , one of ( "left" | "right" | "auto" )
  Default: "auto"

  Sets the horizontal alignment of the text content within hover label box. Has an effect only if the hover label text spans more two or more lines

• bgcolor
  Parent: data[type=histogram].hoverlabel
  Type: color or array of colors

  Sets the background color of the hover labels for this trace

• bordercolor
  Parent: data[type=histogram].hoverlabel
  Type: color or array of colors

  Sets the border color of the hover labels for this trace.

• font
  Parent: data[type=histogram].hoverlabel
  Type: named list containing one or more of the keys listed below.

  Sets the font used in hover labels.

  • color
    Parent: data[type=histogram].hoverlabel.font
    Type: color or array of colors
  • family
    Parent: data[type=histogram].hoverlabel.font
    Type: string or array of strings

    HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

  • lineposition
    Parent: data[type=histogram].hoverlabel.font
    Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
    Examples: "under", "over", "under+over", "under+over+through", "none"
    Default: "none"

    Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

  • shadow
    Parent: data[type=histogram].hoverlabel.font
    Type: string or array of strings
    Default: "none"

    Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

  • size
    Parent: data[type=histogram].hoverlabel.font
    Type: number or array of numbers greater than or equal to 1
  • style
    Parent: data[type=histogram].hoverlabel.font
    Type: enumerated or array of enumerateds , one of ( "normal" | "italic" )
    Default: "normal"

    Sets whether a font should be styled with a normal or italic face from its family.

  • textcase
    Parent: data[type=histogram].hoverlabel.font
    Type: enumerated or array of enumerateds , one of ( "normal" | "word caps" | "upper" | "lower" )
    Default: "normal"

    Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

  • variant
    Parent: data[type=histogram].hoverlabel.font
    Type: enumerated or array of enumerateds , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
    Default: "normal"

    Sets the variant of the font.

  • weight
    Parent: data[type=histogram].hoverlabel.font
    Type: integer or array of integers between or equal to 1 and 1000
    Default: normal

    Sets the weight (or boldness) of the font.

• namelength
  Parent: data[type=histogram].hoverlabel
  Type: integer or array of integers greater than or equal to -1
  Default: 15

  Sets the default length (in number of characters) of the trace name in the hover labels for all traces. -1 shows the whole name regardless of length. 0-3 shows the first 0-3 characters, and an integer >3 will show the whole name if it is less than that many characters, but if it is longer, will truncate to `namelength - 3` characters and add an ellipsis.

Determines if texts are kept at center or start/end points in `textposition` "inside" mode.

Sets the font used for `text` lying inside the bar.

• color
  Parent: data[type=histogram].insidetextfont
  Type: color
• family
  Parent: data[type=histogram].insidetextfont
  Type: string

  HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

• lineposition
  Parent: data[type=histogram].insidetextfont
  Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
  Examples: "under", "over", "under+over", "under+over+through", "none"
  Default: "none"

  Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

• shadow
  Parent: data[type=histogram].insidetextfont
  Type: string
  Default: "none"

  Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

• size
  Parent: data[type=histogram].insidetextfont
  Type: number greater than or equal to 1
• style
  Parent: data[type=histogram].insidetextfont
  Type: enumerated , one of ( "normal" | "italic" )
  Default: "normal"

  Sets whether a font should be styled with a normal or italic face from its family.

• textcase
  Parent: data[type=histogram].insidetextfont
  Type: enumerated , one of ( "normal" | "word caps" | "upper" | "lower" )
  Default: "normal"

  Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

• variant
  Parent: data[type=histogram].insidetextfont
  Type: enumerated , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
  Default: "normal"

  Sets the variant of the font.

• weight
  Parent: data[type=histogram].insidetextfont
  Type: integer between or equal to 1 and 1000
  Default: normal

  Sets the weight (or boldness) of the font.

Sets the font used for `text` lying outside the bar.

• color
  Parent: data[type=histogram].outsidetextfont
  Type: color
• family
  Parent: data[type=histogram].outsidetextfont
  Type: string

  HTML font family - the typeface that will be applied by the web browser. The web browser will only be able to apply a font if it is available on the system which it operates. Provide multiple font families, separated by commas, to indicate the preference in which to apply fonts if they aren't available on the system. The Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise) generates images on a server, where only a select number of fonts are installed and supported. These include "Arial", "Balto", "Courier New", "Droid Sans", "Droid Serif", "Droid Sans Mono", "Gravitas One", "Old Standard TT", "Open Sans", "Overpass", "PT Sans Narrow", "Raleway", "Times New Roman".

• lineposition
  Parent: data[type=histogram].outsidetextfont
  Type: flaglist string. Any combination of "under", "over", "through" joined with a "+" OR "none".
  Examples: "under", "over", "under+over", "under+over+through", "none"
  Default: "none"

  Sets the kind of decoration line(s) with text, such as an "under", "over" or "through" as well as combinations e.g. "under+over", etc.

• shadow
  Parent: data[type=histogram].outsidetextfont
  Type: string
  Default: "none"

  Sets the shape and color of the shadow behind text. "auto" places minimal shadow and applies contrast text font color. See https://developer.mozilla.org/en-US/docs/Web/CSS/text-shadow for additional options.

• size
  Parent: data[type=histogram].outsidetextfont
  Type: number greater than or equal to 1
• style
  Parent: data[type=histogram].outsidetextfont
  Type: enumerated , one of ( "normal" | "italic" )
  Default: "normal"

  Sets whether a font should be styled with a normal or italic face from its family.

• textcase
  Parent: data[type=histogram].outsidetextfont
  Type: enumerated , one of ( "normal" | "word caps" | "upper" | "lower" )
  Default: "normal"

  Sets capitalization of text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.

• variant
  Parent: data[type=histogram].outsidetextfont
  Type: enumerated , one of ( "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase" )
  Default: "normal"

  Sets the variant of the font.

• weight
  Parent: data[type=histogram].outsidetextfont
  Type: integer between or equal to 1 and 1000
  Default: normal

  Sets the weight (or boldness) of the font.

Sets the calendar system to use with `x` date data.

Sets the calendar system to use with `y` date data.

Controls persistence of some user-driven changes to the trace: `constraintrange` in `parcoords` traces, as well as some `editable: TRUE` modifications such as `name` and `colorbar.title`. Defaults to `layout.uirevision`. Note that other user-driven trace attribute changes are controlled by `layout` attributes: `trace.visible` is controlled by `layout.legend.uirevision`, `selectedpoints` is controlled by `layout.selectionrevision`, and `colorbar.(x|y)` (accessible with `config: {editable: TRUE}`) is controlled by `layout.editrevision`. Trace changes are tracked by `uid`, which only falls back on trace index if no `uid` is provided. So if your app can add/remove traces before the end of the `data` array, such that the same trace has a different index, you can still preserve user-driven changes if you give each trace a `uid` that stays with it as it moves.