Precompute design matrix statistics

Precomputes summary statistics of the design array X to speed up MCMC calculations in the AME model

Usage

precomputeX(X)

Arguments

X

n x n x p covariate array

Value

The input array with precomputed statistics as attributes:

Xr

row sums

Xc

column sums

mX

matricized version

mXt

dyad-transposed matricized version

XX

regression sums of squares

XXt

crossproduct sums of squares

Author

Peter Hoff