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Colorway in R

How to set default trace colors using colorway in R with Plotly.


New to Plotly?

Plotly is a free and open-source graphing library for R. We recommend you read our Getting Started guide for the latest installation or upgrade instructions, then move on to our Plotly Fundamentals tutorials or dive straight in to some Basic Charts tutorials.

Set Default Trace Colors with colorway

library(plotly)

x <- seq(-1, 3, length=50)
ones <- rep(1, 50)
a_list <- seq(1, 3, length=7)
b_list <- seq(2, 14, length=7)
df <- data.frame(cbind(x, (outer((x*x), a_list) + outer(ones, b_list))))

fig <- plot_ly(df, x = ~x, y = ~V2, type = 'scatter', mode = 'lines') 
fig <- fig %>%
  add_trace(y = ~V3) 
fig <- fig %>%
  add_trace(y = ~V4) 
fig <- fig %>%
  add_trace(y = ~V5) 
fig <- fig %>%
  add_trace(y = ~V6) 
fig <- fig %>%
  add_trace(y = ~V7) 
fig <- fig %>%
  add_trace(y = ~V8) 
fig <- fig %>%
  layout(colorway = c('#f3cec9', '#e7a4b6', '#cd7eaf', '#a262a9', '#6f4d96', '#3d3b72', '#182844'))


fig

Reference

See https://plotly.com/r/reference/#layout-colorway for more information about the colorway attribute.

What About Dash?

Dash for R is an open-source framework for building analytical applications, with no Javascript required, and it is tightly integrated with the Plotly graphing library.

Learn about how to install Dash for R at https://dashr.plot.ly/installation.

Everywhere in this page that you see fig, you can display the same figure in a Dash for R application by passing it to the figure argument of the Graph component from the built-in dashCoreComponents package like this:

library(plotly)

fig <- plot_ly() 
# fig <- fig %>% add_trace( ... )
# fig <- fig %>% layout( ... ) 

library(dash)
library(dashCoreComponents)
library(dashHtmlComponents)

app <- Dash$new()
app$layout(
    htmlDiv(
        list(
            dccGraph(figure=fig) 
        )
     )
)

app$run_server(debug=TRUE, dev_tools_hot_reload=FALSE)