pairdist.ppp {spatstat} | R Documentation |
Computes the matrix of distances between all pairs of points in a point pattern.
pairdist.ppp(X, ..., method="C")
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.
|
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.
A square matrix whose [i,j]
entry is the distance
between the points numbered i
and j
.
Pavel Grabarnik pavel.grabar@issp.serpukhov.su and Adrian Baddeley adrian@maths.uwa.edu.au http://www.maths.uwa.edu.au/~adrian/
pairdist
,
pairdist.default
,
pairdist.psp
,
crossdist
,
nndist
,
Kest
data(cells) d <- pairdist(cells)