# perimeter

0th

Percentile

##### Perimeter Length of Window

Computes the perimeter length of a window

Keywords
spatial, math
##### 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.

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

• perimeter
##### Examples
perimeter(square(3))
data(letterR)
perimeter(letterR)
if(spatstat.options("gpclib")) {
if(interactive()) {
}