Coloring by an arbitrary cell metadata column (enhancement)

[VPetukhov]

To my understanding, currently there is no way to color the dataset by anything but cluster id. Having a color column selector would add a lot to usability. For example, adding a drop-down to the left of "Change Color Palette". Seems like a very easy fix. Do you plan adding such functionality? If it would help, I can submit a PR for that.

[euxhenh]

I agree that this would be useful. Were you thinking of allowing all keys in adata.obs to be selected? How would we handle columns with too many categorical values? From my experience, this can slow down plot generation a lot.

[VPetukhov]

Thank you for the quick reply! Yes, I meant all variables from adata.obs. IMO, it's fine to leave on the user-side: if they're willing to wait, that's alright. But if you prefer, a hard limit of 30-50 values can be used.

[euxhenh]

Sounds good! I will work on this. Adding it to the plot's header sounds right.

[VPetukhov]

Thank you so much!