Perimeter Length of Window
Computes the perimeter length of a window
perimeter(w)
w |
A window (object of class |
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.
A numeric value giving the perimeter length of the window.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner r.turner@auckland.ac.nz
perimeter(square(3)) perimeter(letterR) if(interactive()) print(perimeter(as.mask(letterR)))
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