\name{orth}
\alias{orth}
\title{Calculate an orthonormal basis}
\usage{orth(mat, skipInac=FALSE)}
\description{ONB = orth(mat) is an orthonormal basis for the range of matrix
mat.  That is, ONB' * ONB = I, the columns of ONB span the same
space as the columns of mat, and the number of columns of ONB is
the rank of mat.}
\value{orthonormal basis for the range of matrix}
\author{Wolfram Stacklies}
\arguments{\item{mat}{matrix to calculate orthonormal base}
\item{skipInac}{do not include components with precision below
.Machine$double.eps if TRUE}}