1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
\name{barplot}
\docType{methods}
\alias{barplot}
\alias{barplot,RasterLayer-method}
\title{Bar plot of a RasterLayer}
\description{Create a barplot of the values of a RasterLayer. For large datasets a regular sample with a size of approximately \code{maxpixels} is used.}
\usage{
\S4method{barplot}{RasterLayer}(height, maxpixels=1000000, digits=0, breaks=NULL, col=rainbow, ...)
}
\arguments{
\item{height}{RasterLayer}
\item{maxpixels}{integer. To regularly subsample very large objects}
\item{digits}{integer used to determine how to \code{\link{round}} the values before tabulating. Set to \code{NULL} or to a large number if you do not want any rounding }
\item{breaks}{breaks used to group the data as in \code{\link[base]{cut}}}
\item{col}{a color generating function such as \code{\link{rainbow}}, or a vector of colors}
\item{...}{additional arguments for plotting as in \code{\link[graphics]{barplot}}}
}
\seealso{ \code{\link{hist}, \link{boxplot}} }
\value{
A numeric vector (or matrix, when \code{beside = TRUE}) of the coordinates of the bar midpoints, useful for adding to the graph. See \code{\link[graphics]{barplot}}
}
\examples{
f <- system.file("external/test.grd", package="raster")
r <- raster(f)
barplot(r, digits=-2, las=2, ylab='Frequency')
op <- par(no.readonly = TRUE)
par(mai = c(1, 2, .5, .5))
barplot(r, breaks=10, col=c('red', 'blue'), horiz=TRUE, digits=NULL, las=1)
par(op)
}
\keyword{methods}
\keyword{spatial}
|
