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popgraph (version 1.4)

centroid_variance: This function takes a data set and a group set and returns centroid variances

Description

This is a convience function for a reduce and distance operation based upon multivariate predictor variables.

Usage

centroid_variance(x, grouping)

Arguments

x
The NxP matrix of raw data.
grouping
The Nx1 vector of grouping factors.

Value

The sum of the within stratum variance for each group