Labels on a stacked area chart

[palewire]

The stacked area chart example is great.

But it would be even better if you could put labels on the areas, as the New York Times did here:

Possible?

[jakevdp]

I don't think vega-lite makes that kind of labeling possible. You could externally compute the location of the text labels and use mark_text, but that's not a very good solution.

[kanitw]

I don't think vega-lite makes that kind of labeling possible

Yeah, currently Vega-Lite doesn't support this.

But once we add add explicit stack transform, we should be able to reproduce (or at least getting close to) this vega example.

If you want to use this, you're welcome to submit a PR to Vega-Lite :)

[jakevdp]

The stack transform is part of Altair 3, so stacked labels like this should be possible now. A relevant example from the gallery is this: https://altair-viz.github.io/gallery/stacked_bar_chart_with_text.html