https://github.com/cran/pracma
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Tip revision: 392ae21a013fb3f518e8f9eb8efb458a55a2eca2 authored by HwB on 09 April 2011, 00:00:00 UTC
version 0.3-0
Tip revision: 392ae21
wilkinson.Rd
\name{wilkinson}
\alias{wilkinson}
\title{Wilkinson Matrix}
\description{
Generate the Wilkinson matrix of size \code{n x n}.The Wilkinson matrix for
testing eigenvalue computations
}
\usage{
wilkinson(n)
}
\arguments{
  \item{n}{integer}
}
\details{
The Wilkinson matrix for testing eigenvalue computations is a symmetric
matrix with three non-zero diagonals and with several pairs of nearly equal
eigenvalues. 
}
\value{
matrix of size \code{n x n}
}
\note{
The two largest eigenvalues of \code{wilkinson(21)} agree to 14, but not 15
decimal places.
}
\seealso{
\code{\link{toeplitz}}
}
\examples{
(a <- wilkinson(7))
eig(a)
}
\keyword{ array }
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