strucchange (version 1.5-4)

root.matrix: Root of a Matrix

Description

Computes the root of a symmetric and positive semidefinite matrix.

Usage

root.matrix(X)

Value

a symmetric matrix of same dimensions as X

Arguments

X

a symmetric and positive semidefinite matrix

Examples

X <- matrix(c(1,2,2,8), ncol=2)
test <- root.matrix(X)
## control results
X
test %*% test