nan handling for continuous and categorical coloring

[Sonja-Stockhaus]

Fix coloring of shapes, labels and points when there are nan values in the vectors to color by

[codecov-commenter]

Codecov Report

❌ Patch coverage is 72.97297% with 50 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.02%. Comparing base (0d4239b) to head (9244f4f).

Files with missing lines	Patch %	Lines
src/spatialdata_plot/pl/utils.py	43.75%	27 Missing ⚠️
src/spatialdata_plot/pl/render.py	83.21%	23 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #427      +/-   ##
==========================================
- Coverage   83.75%   83.02%   -0.73%     
==========================================
  Files           8        8              
  Lines        2555     2681     +126     
==========================================
+ Hits         2140     2226      +86     
- Misses        415      455      +40     

Files with missing lines	Coverage Δ
src/spatialdata_plot/pl/render.py	88.24% <83.21%> (-0.52%)	⬇️
src/spatialdata_plot/pl/utils.py	78.11% <43.75%> (-1.24%)	⬇️

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[Sonja-Stockhaus]

In seg, the value 0 depicts the background, so this would lead to the bg being mapped to the NaN color
The actual label(s) with na in the color_source_vector don't have their id in cell_id anymore, so they're mapped to nothing! => would look like background

[MeyerBender]

Hi @timtreis, just wondering what the status of this is, is there a reason why this hasn't been merged yet? I constantly run into this issue, so this would be a very useful thing to have in the package.

[timtreis]

Hey @MeyerBender, sorry, will resolve the merge conflicts and get it released today :)

[timtreis]

@MeyerBender, there's an edge case that I haven't figured out how to solve yet. Will be a bit delayed

[timtreis]

@MeyerBender can you try this branch?

[MeyerBender]

@timtreis Thanks a lot for your efforts! Just tried it on one of my datasets containing NAs and it worked flawlessly.

[timtreis]

Great! I discovered two other minor but related issue/inconsistencies which are also fixed in this. I'll have to clean it up a bit but should be out next week. Feel free to give code review if you feel comfortable doing so.

[MeyerBender]

Sounds great, happy to have a look