R: Perimeter Length of Window

perimeter {spatstat} | R Documentation

## Perimeter Length of Window

### 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.

### Value

A numeric value giving the perimeter length of the window.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au

and Rolf Turner r.turner@auckland.ac.nz

### See Also

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

### Examples

      perimeter(square(3))
      data(letterR)
      perimeter(letterR)
      if(interactive()) print(perimeter(as.mask(letterR)))

[Package spatstat version 1.54-0 Index]