When I generate grouped barplots in AoG, the colors of the bars are determined by the theme. However, barplots with a single group produce grey bars.
How can I set the bar colors to match the theme?
MWE:
using AlgebraOfGraphics, CairoMakie
df = DataFrame(x = [1,2,3], y = [1,2,3] .* 0.9, z = ["1", "2", "1"]);
set_aog_theme!();
plt1 = data(df) * mapping(:x, :y) * visual(BarPlot);
fig1 = draw(plt1)
plt2 = data(df) * mapping(:x, :y; color = :z) * visual(BarPlot);
fig2 = draw(plt2)
Output for fig1:
Output for fig2:
Oh, do you mean that you would like each bar to be the next color in the default color palette? If so, I guess we could map on :x then feed to verbatim to suppress the colorbar,
using CairoMakie, AlgebraOfGraphics
x = [1, 2, 3]
y = x .* 0.9
df = (; x, y)
plt = data(df) * mapping(:x, :y; color=:x => verbatim) * visual(BarPlot)
draw(plt)
or just set the color visually
plt = data(df) * mapping(:x, :y) * visual(BarPlot; color=x)
draw(plt)
Thanks, but my issue is with the plot without the color mapping. When I plot a single series, the bars are grey. That clashes with all the other bar graphs where the colors come from the theme.
So, Iām trying to replace the grey color in fig1 (in my example) with the first color from fig2.
Ah, do you mean like this equivalent in vanilla Makie with Cycled?
fig = Figure()
ax = Axis(fig[1, 1])
barplot!(ax, x, y; color=Cycled(1))
fig
It looks like there is currently an open issue that would allow this to work in AoG I think, for example with visual(BarPlot; color=Cycled(1)). In the meantime, could using the default color palette directly be a workaround?
set_aog_theme!()
plt = data(df) * mapping(:x, :y) * visual(BarPlot; color=Makie.wong_colors()[1])
draw(plt)
2 Likes
Thank you - that works.
And just to finish up: to match the single bar color with the first bar color of the theme:
thm = AlgebraOfGraphics.aog_theme();
barColors = first(thm.palette);
# and in the plot
visual(BarPlot; color = first(barColors))
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