0th

Percentile

##### Difference of Disc Areas

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

Keywords
spatial, math
##### 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
ngrid
Dimensions of the ngrid * ngrid array of test points that will be used to estimate 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.

##### Value

• A single number (the uncovered area)

AreaInter

##### Aliases
data(cells)
areadiff(u, cells, 0.1)