🐛 Small fix for bug in compensation function.

[ricomnl]

This PR fixes an issue that arises when no indices between the compensation matrix columns and the adatas index (or channel column) are intersecting. Previously this was not caught because idx_in is None doesn't check if idx_in is empty and therefore not caught. I also added a check if X has changed after compensation and am logging a warning if it hasn't.

[mbuttner]

Hi @ricomnl
thanks for your PR! The code looks good so far, but the check failed: black-jupyter would reformat the _process_data.py a little. Can you run pre-commit, please?

[ricomnl]

just did :) thanks for the pointer

[codecov-commenter]

Codecov Report

Merging #39 (b0cbb25) into main (a03ab1f) will decrease coverage by 0.06%.
The diff coverage is 66.66%.

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@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
- Coverage   80.46%   80.41%   -0.06%     
==========================================
  Files          10       10              
  Lines         384      388       +4     
==========================================
+ Hits          309      312       +3     
- Misses         75       76       +1     

Impacted Files	Coverage Δ
pytometry/preprocessing/_process_data.py	65.00% <66.66%> (+0.41%)	⬆️

... and 1 file with indirect coverage changes

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[mbuttner]

Thanks for your contribution! I had to update the CI before I could merge the branch.

[ricomnl]

awesome thanks!