area.owin

0th

Percentile

Area of a Window

Computes the area of a window

Keywords
spatial, math
Usage
area.owin(w)
Arguments
w
A window, whose area will be computed. This should be an object of class owin, or can be given in any format acceptable to as.owin().
Details

If the window W is of type "rectangle" or "polygonal", the area of this rectangular window is computed by analytic geometry. If W is of type "mask" the area of the discrete raster approximation of the window is computed by summing the binary image values and adjusting for pixel size.

Value

• The numerical value of the area of the window.

owin.object, as.owin

• area.owin
Examples
w <- unit.square()
area.owin(w)
# returns 1.00000

k <- 6
theta <- 2 * pi * (0:(k-1))/k
co <- cos(theta)
si <- sin(theta)
mas <- owin(c(-1,1), c(-1,1), poly=list(x=co, y=si))
area.owin(mas)
# returns approx area of k-gon

# returns 3.14 approx