stacked bar chart doesn't support negative values

[declann]

In which chart does the bug happen?

• Stacked bar chart

RAWGraphs Version 2.0 beta: https://app.rawgraphs.io/

Steps to reproduce this

Aiming to reproduce the stacked bar chart @ https://observablehq.com/@declann/some-cashflows?collection=@declann/calculang which is created with vega-lite. There are negative values, but we can see that this works neatly in the vega-lite visualisation.

To attempt to reproduce the visual, I did:

• Hit 'csv download (unpivoted)' in https://observablehq.com/@declann/some-cashflows?collection=@declann/calculang
• At https://app.rawgraphs.io/ load the csv file and set separator to comma
• Configured mappings:

But it results in an error message "Values cannot be negative".

It would be useful to support negative values, as in vega-lite.

[declann]

The vega-lite stacked chart (includes a line overlay which we do not need):

[Moeinmn]

I would love to work on this issue @giorgiouboldi

[mikima]

Hi @Moeinmn! do you still plan to work on this issue?