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perimeter {spatstat}

Perimeter Length of Window
Package: 
spatstat
Version: 
1.31-2

Description

Computes the perimeter length of a window

Usage

perimeter(w)

Arguments

w
A window (object of class "owin") or data that can be converted to a window by as.owin.

Details

This function computes the perimeter (length of the boundary) of the window w. If w is a rectangle or a polygonal window, the perimeter is the sum of the lengths of the edges of w. If w is a mask, it is first converted to a polygonal window using as.polygonal, then staircase edges are removed using simplify.owin, and the perimeter of the resulting polygon is computed.

Values

A numeric value giving the perimeter length of the window.

See Also

area.owin diameter.owin, owin.object, as.owin

Examples

perimeter(square(3))
  data(letterR)
  perimeter(letterR)
  if(spatstat.options("gpclib")) {
     if(interactive()) {
     print(perimeter(as.mask(letterR)))
    } else print(perimeter(as.mask(letterR, dimyx=32)))
  }

Author(s)

Adrian Baddeley Adrian.Baddeley@csiro.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner r.turner@auckland.ac.nz

Documentation reproduced from package spatstat, version 1.31-2. License: GPL (>= 2)