perimeter {spatstat} | R Documentation |
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@csiro.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner r.turner@auckland.ac.nz
area.owin
diameter.owin
,
owin.object
,
as.owin
perimeter(square(3)) data(letterR) perimeter(letterR) if(spatstat.options("gpclib")) { if(interactive()) { print(perimeter(as.mask(letterR))) } else print(perimeter(as.mask(letterR, dimyx=32))) }