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Computes the perimeter length of a window
perimeter(w)A numeric value giving the perimeter length of the window.
A window (object of class "owin")
or data that can be converted to a window by as.owin.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner rolfturner@posteo.net
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.
area.owin
diameter.owin,
owin.object,
as.owin
perimeter(square(3))
perimeter(letterR)
if(interactive()) print(perimeter(as.mask(letterR)))
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