spatstat (version 1.15-3)

areadiff: Difference of Disc Areas

Description

Computes the area of that part of a disc that is not covered by other discs.

Usage

areadiff(u, X, r, ngrid=256)

Arguments

u

Coordinates of the centre of the disc. A vector of length 2.

X

Locations of the centres of other discs. A point pattern (object of class "ppp").

r

Disc radius.

ngrid

Dimensions of the ngrid * ngrid array of test points that will be used to estimate the uncovered area.

Value

• A single number (the uncovered area)

Details

This function computes the area of that part of the disc of radius r centred at the location u that is not covered by any of the discs of radius r centred at the points of the pattern X.

See Also

AreaInter

Examples

data(cells)
   u <- c(0.5,0.5)
   areadiff(u, cells, 0.1)