Filled Area Plots in Julia

Filled area chart with plotly.graph_objects

Basic Overlaid Area Chart

using PlotlyJS

plot([
    scatter(x=1:4, y=[0, 2, 3, 5], fill="tozeroy"), # fill down to xaxis
    scatter(x=1:4, y=[3, 5, 1, 7], fill="tonexty"), # fill to trace0 y
])

Overlaid Area Chart Without Boundary Lines

Set mode = "none" to remove boundary lines.

using PlotlyJS

plot([
    scatter(x=1:4, y=[0, 2, 3, 5], fill="tozeroy", mode="none"),
    scatter(x=1:4, y=[3, 5, 1, 7], fill="tonexty", mode="none"),
])

Interior Filling for Area Chart

using PlotlyJS

plot([
    scatter(x=1:4, y=[3, 4, 8, 3], mode="lines", line_color="indigo"),
    scatter(x=1:4, y=[1, 6, 2, 6], mode="lines", line_color="indigo", fill="tonexty"),
])

Stacked Area Chart

The stackgroup parameter is used to add the y values of the different traces in the same group. Traces in the same group fill up to the next trace of the group.

using PlotlyJS

x = ["Winter", "Spring", "Summer", "Fall"]

plot([
    scatter(
        x=x, y=[40, 60, 40, 10],
        stackgroup="one", mode="lines", hoverinfo="x+y",
        line=attr(width=0.5, color="rgb(131, 90, 241)")
    ),
    scatter(
        x=x, y=[20, 10, 10, 60],
        stackgroup="one", mode="lines", hoverinfo="x+y",
        line=attr(width=0.5, color="rgb(111, 231, 219)")
    ),
    scatter(
        x=x, y=[40, 30, 50, 30],
        stackgroup="one", mode="lines", hoverinfo="x+y",
        line=attr(width=0.5, color="rgb(184, 247, 2121)")
    ),
], Layout(yaxis_range=(0, 100)))

Stacked Area Chart with Normalized Values

using PlotlyJS

x = ["Winter", "Spring", "Summer", "Fall"]

plot([
    scatter(
        x=x, y=[40, 60, 40, 10],
        line=attr(width=0.5, color="rgb(131, 90, 241)"),
        stackgroup="one", mode="lines", hoverinfo="x+y",
        groupnorm="percent" # sets the normalization for the sum of the stackgroup
    ),
    scatter(
        x=x, y=[20, 10, 10, 60],
        stackgroup="one", mode="lines", hoverinfo="x+y",
        line=attr(width=0.5, color="rgb(111, 231, 219)")
    ),
    scatter(
        x=x, y=[40, 30, 50, 30],
        stackgroup="one", mode="lines", hoverinfo="x+y",
        line=attr(width=0.5, color="rgb(184, 247, 2121)")
    ),
], Layout(yaxis=attr(ticksuffix="%", range=(0, 100))))

Reference

See https://plotly.com/julia/reference/scatter/#scatter-line and https://plotly.com/julia/reference/scatter/#scatter-fill for more information and attribute options!