Cannot continue drawing a non-existent type of agents

[SongshGeo]

When there isn't any specific type of agent, the visualization by solara would raise error because draw_orthogonal_grid (I suppose other drawing methods are the same) cannot parse the arguments generated from the function collect_agent_data. Take the orthogonal space as an example, the error is like:

  File "/Users/songshgeo/Documents/VSCode/SC-20230710-SCE/.venv/lib/python3.11/site-packages/mesa/visualization/mpl_space_drawing.py", line 575, in _scatter
    x = loc[:, 0]
        ~~~^^^^^^
IndexError: too many indices for array: array is 1-dimensional, but 2 were indexed

This bug is mainly due to the lack of consideration of the scenario where a type of agent completely disappears. I am willing to open a PR to fix this bug for an orthogonal grid. However, I have not tested in higher-dimensional spaces.

[quaquel]

Yes this is a known issue. See #2642.

[SongshGeo]

Woop, sorry, I didn't search the existing issue with the correct keywords. I looked at your discussion and just realized that my local solution for a 2D grid cannot be applied to other high-dimensional spaces. So, yes, I agree with redesigning the API.

Thanks for your prompt reply.

[quaquel]

No worries; the fact that several people have reported a version of this issue in recent weeks highlights the importance of addressing it.