https://github.com/cran/spatstat
Tip revision: 80e2bf6554e41a2e631d507470867f9586310633 authored by Adrian Baddeley on 10 January 2019, 15:30:04 UTC
version 1.58-2
version 1.58-2
Tip revision: 80e2bf6
fardist.Rd
\name{fardist}
\alias{fardist}
\alias{fardist.ppp}
\alias{fardist.owin}
\title{
Farthest Distance to Boundary of Window
}
\description{
Computes the farthest distance from each pixel, or each data point,
to the boundary of the window.
}
\usage{
fardist(X, \dots)
\method{fardist}{owin}(X, \dots, squared=FALSE)
\method{fardist}{ppp}(X, \dots, squared=FALSE)
}
\arguments{
\item{X}{
A spatial object such as a window or point pattern.
}
\item{\dots}{
Arguments passed to \code{\link{as.mask}} to determine
the pixel resolution, if required.
}
\item{squared}{
Logical. If \code{TRUE}, the squared distances will be
returned.
}
}
\details{
The function \code{fardist} is generic, with methods for
the classes \code{owin} and \code{ppp}.
For a window \code{W}, the command \code{fardist(W)}
returns a pixel image in which the value at each pixel
is the \emph{largest} distance from that pixel to the boundary of
\code{W}.
For a point pattern \code{X}, with window \code{W}, the
command \code{fardist(X)} returns a numeric vector
with one entry for each point of \code{X}, giving the
largest distance from that data point to the boundary of \code{W}.
}
\value{
For \code{fardist.owin}, a pixel image (object of class \code{"im"}).
For \code{fardist.ppp}, a numeric vector.
}
\examples{
fardist(cells)
plot(FR <- fardist(letterR))
}
\author{\adrian
\rolf
and \ege
}
\keyword{spatial}
\keyword{math}