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
# NOT RUN {
perimeter(square(3))
data(letterR)
perimeter(letterR)