Model overview: use spline instead of line chart

[romanlutz]

Description

This PR replaces the line chart with a spline chart to make it more pleasant to look at. The only real change is that the chart option is changed from "line" to "spline", the rest are renaming changes.

Old experience:

New experience:

Checklist

• I have added screenshots above for all UI changes.
• I have added e2e tests for all UI changes.
• Documentation was updated if it was needed.

[imatiach-msft]

@romanlutz what do you think about giving them the option of doing both? The spline can be misleading in many cases.

[codecov-commenter]

Codecov Report

Merging #1508 (075b95a) into main (c01744e) will decrease coverage by 2.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1508      +/-   ##
==========================================
- Coverage   89.30%   87.27%   -2.03%     
==========================================
  Files          38      108      +70     
  Lines        1617     5108    +3491     
==========================================
+ Hits         1444     4458    +3014     
- Misses        173      650     +477     

Flag	Coverage Δ
unittests	87.27% <ø> (-2.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
raiwidgets/raiwidgets/error_handling.py	100.00% <0.00%> (ø)
raiwidgets/raiwidgets/dashboard.py	92.68% <0.00%> (ø)
.../databalanceanalysis/aggregate_balance_measures.py	92.85% <0.00%> (ø)
raiwidgets/raiwidgets/explanation_constants.py	100.00% <0.00%> (ø)
...ibleai/_tools/causal/dashboard_schemas/__init__.py	100.00% <0.00%> (ø)
...ai/databalanceanalysis/feature_balance_measures.py	100.00% <0.00%> (ø)
raiwidgets/raiwidgets/error_analysis_dashboard.py	72.41% <0.00%> (ø)
...sponsibleai/responsibleai/managers/base_manager.py	95.23% <0.00%> (ø)
...dgets/raiwidgets/error_analysis_dashboard_input.py	66.21% <0.00%> (ø)
...ponsibleai/responsibleai/rai_insights/constants.py	100.00% <0.00%> (ø)
... and 60 more

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/romanlutz/spline_chart/dashboard/index.html

[romanlutz]

@romanlutz what do you think about giving them the option of doing both? The spline can be misleading in many cases.

Technically, this should be a histogram. However, we didn't find a good way to make a histogram with multiple cohorts that can still be read in a meaningful way (we tried...). The alternative was the line chart. The lines are actually just there to connect the dots, otherwise you would have a tough time figuring out which dots belong together. I think the general perception was that the pure line chart is terribly ugly and nobody wants to look at it. The splines are much more visually pleasing. However, I agree on them having the potential to mislead. That said, we're not saying that this is the actual probability distribution, but just a spline chart of counts (if you look at the axis and toggle).

Two things are still missing here IMO that will also help:

• give users control of binning on the x-axis - the more bins there are the better of an idea we get of the distribution (at least to a certain number and assuming we have plenty of samples)
• make the y-axis the percentage of total cohort count rather than an absolute count in the bin. If we did that all the cohorts would probably look the same since they are mostly distinct in their size (number of samples).

Anyway, we can bring this up with PM to see if there's a need to have the pure line chart, too. Seeing as nobody wanted it to begin with and it was just my stopgap solution until I can make a spline chart, I doubt it. Will keep you posted!

[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/romanlutz/spline_chart/dashboard/index.html