How to dynamically get the figure number as a string?

Questions
,
1

I’m trying to solve this problem:

    #figure(
      {
        let fname = "plot_" + str(figure.counter.display("1")) + ".png"
        image(fname, width: 100%)
      },
      caption: [_Boxplot showing the difference in alpha diversity between responders and non-responders. All treatment timepoints are cumulated._],
    )

I’m open for suggestions. Using typst 0.14.0.

2

figure does not have a counter member, but counter can access the current figure counter through counter(figure). Since this is also context-aware function, you need to add context somewhere fitting.

#figure(
  context {
    let fname = "plot_" + str(counter(figure.where(kind: image)).display("1")) + ".png"
    image(fname, width: 100%)
  },
  caption: [_Boxplot showing the difference in alpha diversity between responders and non-responders. All treatment timepoints are cumulated._],
)

Also noticed, if you want all captions to have a specific style, you can add a #show figure.caption: ... rule à la How to make captions italic?

Edit: changed counter(figure) to counter(figure.where(kind: image)) to be more specific

3

I think you will need to use counter(figure.where(kind: image)) and similar, so that you get the right counter, since they are separate for images and tables and so on.

4

Yes, counter(figure) will keep track of figure elements of all kinds.

5

Many thanks! I was aware of How to make captions italic? and I was trying work out the solution that @Electron_Wizard showed me but I also add @bluss detail.

6

Oh, so I still learned something. I had no idea it did anything at all, I thought the kind-specific counters were the only ones.

7

Maybe it should be mentioned in Figure Function – Typst Documentation or Counter Type – Typst Documentation. But I think in most documents it doesn’t make sense to use.

8

ah yes, was a little too focused on image only figures :)