Where should linkaxes! go?

[Klafyvel]

Hi there! I found myself making faulty plots several times lately because axes I thought I had linked ended up not being linked. Is there a specific place where linkaxes! should be positioned? In the documentation it's placed right after the definition of the axes, but if I do this:

set_theme!()
f = Figure()
ax = Axis(
    f[1, 1];
    xlabel="Energy [eV]",
    ylabel="PL [norm.]",
)
ax_abs = Axis(
    f[1, 1];
    ylabel="Absorption [norm.]",
    yaxisposition=:right,
)
linkaxes!(ax, ax_abs)
hidespines!(ax_abs)

energies = range(start=1, stop=3, length=500)
abso = @. exp(-(energies - 2)^2 / (2*0.01)^2)
lines!(ax, energies, abso)
lines!(ax_abs, energies, abso, color=Cycled(2))
f
save("link_before_plotting.png", f)

I get the following plot:

Whereas if I link after plotting:

set_theme!()
f = Figure()
ax = Axis(
    f[1, 1];
    xlabel="Energy [eV]",
    ylabel="PL [norm.]",
)
ax_abs = Axis(
    f[1, 1];
    ylabel="Absorption [norm.]",
    yaxisposition=:right,
)
hidespines!(ax_abs)

energies = range(start=1, stop=3, length=500)
abso = @. exp(-(energies - 2)^2 / (2*0.01)^2)
lines!(ax, energies, abso)
lines!(ax_abs, energies, abso, color=Cycled(2))
linkaxes!(ax, ax_abs)
f
save("link_after_plotting.png", f)

I get the correct plot:

Is this a bug, or do I misunderstand the goal of linkaxes!?

[jkrumbiegel]

This must be a bug, linked axes should stay synchronized if you keep plotting stuff.

[Klafyvel]

Ok, thanks. Do you want me to copy this question into an issue?

[jkrumbiegel]

Yes that's a good idea. The update order with limits is a bit tricky so it would be good to write more tests for it, too.