[ENH] Allow stratifying phenotypic column histogram by session

[alyssadai]

Closes #95

Changes proposed in this pull request:

• Add switch that allows toggling whether the histogram for a selected column is stratified by session
  • When on, counts for different sessions within the same value bin are shown as side-by-side bars, color-coded by session
• Add a box subplot (that can also be stratified by session) for continuous data columns only, to easily expose session-specific distribution stats
• Disable displaying histogram bar values as text, to avoid over-cluttering the plot (values are still available on hover)

Checklist

• PR has an interpretable title with a prefix ([ENH], [FIX], [REF], [TST], [CI], [MNT], [INF], [MODEL], [DOC]) (see https://neurobagel.org/contributing/pull_requests for more info)
• PR links to GitHub issue with mention Closes #XXXX
• Tests pass
• Checks pass

For new features:

• Tests have been added

For bug fixes:

• There is at least one test that would fail under the original bug conditions.

[alyssadai]

Hey @nikhil153, looping you in here in case you have any functional feedback on the new feature (no worries if not). 🙂

[nikhil153]

Thanks @alyssadai !
Functionally looks good based on our previous conversation. For future ENH, I would curious to know if would be easy to label outlier subjects (e.g. the left side data-points in the horizontal boxplots) either in the figure or in the stats on side.

[alyssadai]

Hey @nikhil153, I've pushed a change that displays, on hover, the participant ID of outlier points in the box plot along with the column value. I've also jittered the points so outliers can be differentiated more easily.

Let me know if that's what you were looking for 🙂

[surchs]

Very cool PR @alyssadai 🎉

I tested it out locally, seems to do all the things you say! Seeing how much of a pain these selenium tests are for UI testing, I won't suggest you add any, maybe we can take some time after OHBM and see if there is an easier way.

Good to go 🧑‍🍳

[nikhil153]

@alyssadai - That's perfect! Thanks :)