https://github.com/cran/spatstat
Tip revision: 1a4b153dab7a7656ab810d53e156a13a67e4eea5 authored by Adrian Baddeley on 01 August 2018, 14:50:03 UTC
version 1.56-1
version 1.56-1
Tip revision: 1a4b153
rotate.psp.Rd
\name{rotate.psp}
\alias{rotate.psp}
\title{Rotate a Line Segment Pattern}
\description{
Rotates a line segment pattern
}
\usage{
\method{rotate}{psp}(X, angle=pi/2, \dots, centre=NULL)
}
\arguments{
\item{X}{A line segment pattern (object of class \code{"psp"}).}
\item{angle}{Angle of rotation.}
\item{\dots}{
Arguments passed to \code{\link{rotate.owin}} affecting
the handling of the observation window, if it is a binary pixel
mask.
}
\item{centre}{
Centre of rotation.
Either a vector of length 2, or a character string
(partially matched to \code{"centroid"}, \code{"midpoint"}
or \code{"bottomleft"}).
The default is the coordinate origin \code{c(0,0)}.
}
}
\value{
Another object of class \code{"psp"} representing the
rotated line segment pattern.
}
\details{
The line segments of the pattern, and the window of observation,
are rotated about the origin by the angle specified.
Angles are measured in
radians, anticlockwise. The default is to rotate the pattern 90 degrees
anticlockwise. If the line segments carry marks, these are preserved.
}
\seealso{
\code{\link{psp.object}},
\code{\link{rotate.owin}},
\code{\link{rotate.ppp}}
}
\examples{
oldpar <- par(mfrow=c(2,1))
X <- psp(runif(10), runif(10), runif(10), runif(10), window=owin())
plot(X, main="original")
Y <- rotate(X, pi/4)
plot(Y, main="rotated")
par(oldpar)
}
\author{\adrian
and \rolf
}
\keyword{spatial}
\keyword{math}