elaird/supy — pull request #141 by betchart (2012-08-30 03:35:53+00:00)
Title: Tridiscriminant

Secondary calculable implementation of a discriminant between three populations.

The discriminant is the angle of the sum of 3 vectors at 0,2pi/3,4pi/3 radians, scaled respectively by the likelihood of each population. Nice properties of the tridiscriminant: symmetric in every pair of populations; periodic boundary.

Will merge immediately into 'devel'.