Ginv: G inverse

In PERMANOVA: Multivariate Analysis of Variance Based on Distances and Permutations

Description

Calculates the g-inverse of a squared matrix using the eigen decomposition and removing the eigenvalues smaller than a tolerance.

Usage

Ginv(X, tol = sqrt(.Machine$double.eps))

Arguments

X	Matrix to calculate the g-inverse.
tol	Tolerance.

Details

The function is useful to avoid singularities.

Value

Returns the g-inverse.

Author(s)

Jose Luis Vicente-Villardon

Examples

data(iris)
x=as.matrix(iris[,1:4])
S= t(x) 
Ginv(S)

PERMANOVA documentation built on Sept. 6, 2021, 5:07 p.m.