Extract.linnet

0th

Percentile

Extract Subset of Linear Network

Extract a subset of a linear network.

Keywords
manip, spatial
Usage
# S3 method for linnet
[(x, i, …, snip=TRUE)
Arguments
x

A linear network (object of class "linnet").

i

Spatial window defining the subregion. An object of class "owin".

snip

Logical. If TRUE (the default), segments of x which cross the boundary of i will be cut by the boundary. If FALSE, these segments will be deleted.

Ignored.

Details

This function computes the intersection between the linear network x and the domain specified by i.

This function is a method for the subset operator "[" for linear networks (objects of class "linnet"). It is provided mainly for completeness.

The index i should be a window.

The argument snip specifies what to do with segments of x which cross the boundary of i. If snip=FALSE, such segments are simply deleted. If snip=TRUE (the default), such segments are cut into pieces by the boundary of i, and those pieces which lie inside the window i are included in the resulting network.

Value

Another linear network (object of class "linnet").

• [.linnet
Examples
# NOT RUN {
p <- par(mfrow=c(1,2), mar=0.2+c(0,0,1,0))
B <- owin(c(0.1,0.7),c(0.19,0.6))

plot(simplenet, main="x[w, snip=TRUE]")
plot(simplenet[B], add=TRUE, col="green", lwd=3)
plot(B, add=TRUE, border="red", lty=3)

plot(simplenet, main="x[w, snip=FALSE]")
plot(simplenet[B, snip=FALSE], add=TRUE, col="green", lwd=3)
plot(B, add=TRUE, border="red", lty=3)

par(p)
# }
Documentation reproduced from package spatstat, version 1.60-1, License: GPL (>= 2)

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