# pairdist.ppp

0th

Percentile

##### Pairwise distances

Computes the matrix of distances between all pairs of points in a point pattern.

Keywords
spatial, math
##### Usage
## S3 method for class 'ppp':
pairdist(X, \dots, method="C")
##### Arguments
X
A point pattern (object of class "ppp").
...
Ignored.
method
String specifying which method of calculation to use. Values are "C" and "interpreted". Usually not specified.
##### Details

This is a method for the generic function pairdist.

Given a point pattern X (an object of class "ppp"), this function computes the Euclidean distances between all pairs of points in X, and returns the matrix of distances.

The argument method is not normally used. It is retained only for checking the validity of the software. If method = "interpreted" then the distances are computed using interpreted R code only. If method="C" (the default) then C code is used. The C code is somewhat faster.

##### Value

• A square matrix whose [i,j] entry is the distance between the points numbered i and j.

pairdist, pairdist.default, pairdist.psp, crossdist, nndist, Kest
data(cells)
d <- pairdist(cells)