elaird / supy

analyze events stored in TTrees in parallel
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Tridiscriminant #141

Closed betchart closed 12 years ago

betchart commented 12 years ago

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'.