Makie - single bar label for stacked bar

[sleak]

I have a stacked bar plot, and can add a label to each block in the stack with bar_labels=:y. But this is noisy, and I’d like to only add a single label to the top of the stack, showing the total stacked value. How do I do that?

(here’s an example, borrowed from Bar Label Alignment · Issue #3160 · MakieOrg/Makie.jl · GitHub)

tbl = (x = [1, 1, 1, 2, 2, 2, 3, 3, 3],
       height = 0.1:0.1:0.9,
       grp = [1, 2, 3, 1, 2, 3, 1, 2, 3],
       grp1 = [1, 2, 2, 1, 1, 2, 1, 1, 2],
       grp2 = [1, 1, 2, 1, 2, 1, 1, 2, 1]
       )

barplot(
        tbl.x, tbl.height,
        stack = tbl.grp,
        color = tbl.grp,
        bar_labels = :y,
        axis = (xticks = (1:3, ["left", "middle", "right"]),),
    )

I’d like it to show only the labels at the top of each bar, ie “0.6”, “1.5” and “2.4”

thanks!

[jules]

There’s no inbuilt convenience function to do that, but you can pass a vector of labels to bar_labels and you can make all that you want to hide ""

[sleak]

Perfect!

using CairoMakie, Makie

tbl = (x = [1, 1, 1, 2, 2, 2, 3, 3, 3],
       height = 0.1:0.1:0.9,
       grp = [1, 2, 3, 1, 2, 3, 1, 2, 3],
       )

barplot(
        tbl.x, tbl.height,
        stack = tbl.grp,
        color = tbl.grp,
        bar_labels = [g==3 ? "$h" : "" for (g,h) in zip(tbl.grp, tbl.height)],
        axis = (xticks = (1:3, ["left", "middle", "right"]),),
    )