multivator (version 1.1-11)

ipd: Positive definite matrices

Description

Is a matrix symmetric positive-definite?

Usage

ipd(mat)

Value

Returns either TRUE if symmetric positive-definite; or FALSE, printing a diagnostic message.

Arguments

mat

A matrix

Author

Robin K. S. Hankin

Examples

data(mtoys)
stopifnot(ipd(crossprod(matrix(rnorm(30),10))))
stopifnot(ipd(M(toy_mhp)))