allow for additional Condorcet completion methods

aeggers / votevizr

R package for representing ordinal election results on a ternary/barycentric diagram.

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allow for additional Condorcet completion methods #3

Closed aeggers closed 4 years ago

aeggers commented 4 years ago

Allow a Condorcet cycle to be resolved by

RCV
any positional method

Pseudocode:

make condorcet plot to get the vertices of the cyclical triangle
make plot for the completion method (RCV, any positional)
mask everything outside the cyclical coordinates using polygons
make condorcet plot again, with the cyclical triangle being transparent so we can see the completion method

aeggers commented 4 years ago

less clear how to do this in ggplot.

aeggers commented 4 years ago

maybe the solution is to use spatial stuff -- e.g. https://gis.stackexchange.com/questions/63577/joining-polygons-in-r

union of two polygons. etc

what we want is: you are in A's win region if you're in the Condorcet win region or in the union of the Condorcet cyclical region and the A's e.g. RCV win region.

aeggers commented 4 years ago

Did this just by adding layers -- works very well. A little unsatisfying that first_preference_win_regions() doesn't get the actual regions when if_cycle is IRV or Borda or positional etc.