spatstat (version 1.48-0)

endpoints.psp: Endpoints of Line Segment Pattern

Description

Extracts the endpoints of each line segment in a line segment pattern.

Usage

endpoints.psp(x, which="both")

Arguments

x

A line segment pattern (object of class "psp").

which

String specifying which endpoint or endpoints should be returned. See Details.

Value

Point pattern (object of class "ppp").

Details

This function extracts one endpoint, or both endpoints, from each of the line segments in x, and returns these points as a point pattern object. The argument which determines which endpoint or endpoints of each line segment should be returned:

The result is a point pattern. It also has an attribute "id" which is an integer vector identifying the segment which contributed each point.

See Also

psp.object, ppp.object, midpoints.psp

Examples

  a <- psp(runif(10), runif(10), runif(10), runif(10), window=owin())
  plot(a)
  b <- endpoints.psp(a, "left")
  plot(b, add=TRUE)