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% $Id: rot90.Rd 25 2022-05-30 18:46:01Z proebuck $
\name{rot90}
\alias{rot90}
\title{MATLAB rot90 function}
\description{
Rotates matrix counterclockwise \code{k*90} degrees.
}
\usage{
rot90(A, k=1)
}
\arguments{
\item{A}{matrix to be rotated}
\item{k}{numeric scalar specifying the number of times to rotate (1..4)}
}
\details{
Rotating 4 times (360 degrees) returns the original matrix unchanged.
}
\value{
Returns matrix corresponding to argument \code{A} having been rotated
argument \code{k} number of times.
}
\author{
P. Roebuck \email{proebuck1701@gmail.com}
}
\seealso{
\code{\link{fliplr}},
\code{\link{flipud}}
}
\examples{
rot90(matrix(1:4, 2, 2))
}
\keyword{array}
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