How to draw a graph with GraphMakie and remove whitespace around it?

Specific Domains Graphs
1

There is an example in GraphMakie.jl

using CairoMakie
using GraphMakie
using Graphs

g = wheel_graph(10)
f, ax, p = graphplot(g)
hidedecorations!(ax); hidespines!(ax)
ax.aspect = DataAspect()

The result is a picture like this:

7e8d3b49
7e8d3b491600×800 22.7 KB

If you open this PNG in a image editor, you can see that there are actually a lot of white space around it. Is there a way to remove it?

2

I managed to reduce the whitespace with the following code:

using CairoMakie
using GraphMakie
using Graphs

g = wheel_graph(10)
f, ax, p = graphplot(g)
hidedecorations!(ax); hidespines!(ax)
colsize!(f.layout, 1, Aspect(1, 1.0))
resize_to_layout!(f)

I guess this solution relies on knowing the aspect ratio of the plotted graph. I don’t know if there’s a more general solution.

1 Like
3

Thanks! That works. Would please elaborate a bit how it works?
It is really confusing how the width of the final picture is decided.

4

My understanding (not an expert here!) is that the figure and the axis are distinct entities. In your example, the figure is initiated with a default size. We then adjust the aspect ratio, but this only affects the axis, not the figure, leaving quite a bit of whitespace.

I would have to re-read the tutorial on aspect ratios; I think provides a lot more detail on this.

1 Like
5

That’s correct. When you give Axis an aspect, it just always resizes itself given the currently available space, but that’s after the layout is computed. So for resize_to_layout! the final size of the Axis is not known, so it cannot remove the whitespace. But giving rows or columns a fixed aspect ratio does let resize_to_layout! determine how much excess space there is.

3 Likes