Extract.linnet: Extract Subset of Linear Network

In spatstat.linnet: Linear Networks Functionality of the 'spatstat' Family

Extract Subset of Linear Network

Description

Extract a subset of a linear network.

Usage

  ## S3 method for class '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").

Author(s)

\adrian

, \rolf, \ege and Suman Rakshit.

Examples

  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)

spatstat.linnet documentation built on Sept. 20, 2024, 5:06 p.m.