Value-By-Alpha implementation from mapclassify from splot

[jGaboardi]

• This PR is an initial attempt at implementing to Value-By-Alpha choropleth functionality from splot in mapclassify – integrate VBA classification from splot into mapclassify #272.
  • (no testing all yet)
• I'm seeking thoughts and feedback on everything – API, additions, defaults, etc.
• A big question is the best way to handle the matplotlib dependency
• Once all the kinks are worked out and tests have been reworked it would likely resolve:
  • [MAINT] integrate splot.mapping.mapclassify_bin into mapclassify splot#118
  • Is there a way to have the lowest alpha class visible? splot#138
  • [MAINT] change tests to figure testing splot#145
  • vba_choropleth - Transparent polygons splot#146
  • Customizing legends in vba_choropleth splot#173

---

• xref
  • integrate VBA classification from splot into mapclassify #272
  • Sunsetting splot splot#188
• Also would need to add to a migration notebook once merged

[codecov]

Codecov Report

Attention: Patch coverage is 28.57143% with 105 lines in your changes missing coverage. Please review.

Project coverage is 83.3%. Comparing base (0a209cf) to head (9191be6).

Files with missing lines	Patch %	Lines
mapclassify/value_by_alpha.py	28.1%	105 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (0a209cf) and HEAD (9191be6). Click for more details.

HEAD has 14 uploads less than BASE

Flag	BASE (0a209cf)	HEAD (9191be6)
	28	14

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #274     +/-   ##
=======================================
- Coverage   90.1%   83.3%   -6.8%     
=======================================
  Files         10      11      +1     
  Lines       1185    1332    +147     
=======================================
+ Hits        1068    1110     +42     
- Misses       117     222    +105     

Files with missing lines	Coverage Δ
mapclassify/__init__.py	100.0% <100.0%> (ø)
mapclassify/_classify_API.py	96.6% <ø> (ø)
mapclassify/value_by_alpha.py	28.1% <28.1%> (ø)

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[jGaboardi]

@sjsrey – do you think I should go ahead and add tests here or wait for other's comments?

Probably can simply decorate the functions here the need matplotlib with libpysal's @requires.

Maybe also go ahead and do that with the legendgram stuff, but will need need to import the matplotlib stuff in each function unless I am missing something.

[sjsrey]

@sjsrey – do you think I should go ahead and add tests here or wait for other's comments?

Probably can simply decorate the functions here the need matplotlib with libpysal's @requires.

Maybe also go ahead and do that with the legendgram stuff, but will need need to import the matplotlib stuff in each function unless I am missing something.

I'd wait to hear from others before adding tests.