Alpha keyword ignored in scatterlines

Specific Domains Visualization
, , ,
1

MWE:

using CairoMakie

set_theme!(theme_latexfonts())
update_theme!(
    palette=(color=ColorSchemes.glasbey_category10_n256.colors,),
    ScatterLines=(cycle=Cycle(:color),)
)

function main()
    f = Figure()
    ax = Axis(f[1, 1])

    for i in 1:1
        scatterlines!(ax, 0:127, rand(128), label=string(i), alpha=0.5)
        lines!(ax, 0:127, rand(128), label=string(i), alpha=0.5)
    end

    Legend(f[1, 2], ax, "Some Title", framevisible=false)
    ax.xlabel = "x-axis"
    ax.ylabel = "y-axis"

    resize_to_layout!(f)
    display(f)
end

main()

image
image1200Ă—900 192 KB

It seems like the alpha keyword is possibly ignored in scatterlines? Or perhaps I am doing something wrong again. The same thing happens in a fresh julia session after commenting out the lines to do with theming.

2

It’s always good to take the “M” in MWE seriously to make life easy for others. In this case you probably want:

scatterlines(rand(10); alpha = 0.1)

which indeed doesn’t work. There’s a bit of alpha whack-a-mole in the Makie repo:

So feel free to add your issue I guess? Maybe @jules @sdanisch have other plans on how to deal with this more generally?

3

Thanks for the tip, I’ll have to remind myself what minimal means lol. Unfortunate to see this is an issue in other parts of Makie as well

4

I think you can use

scatterlines(rand(10), color=(Makie.wong_colors()[1],0.5))

Unfortunately, you cannot use color=(Cycled(1),0.5), but I think there was an issue already opened for this.

1 Like
5

Thank you, your suggestion works well! I was able to use it with ColorSchemes.glasbey_category10_n256.colors[i], 0.7