## S3 method for class 'ppp':
pairdist(X, \dots, periodic=FALSE, method="C")
"ppp"
)."C"
and "interpreted"
.
Usually not specified.[i,j]
entry is the distance
between the points numbered i
and j
.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.
Alternatively if periodic=TRUE
and the window containing X
is a
rectangle, then the distances will be computed in the `periodic'
sense (also known as `torus' distance): opposite edges of the
rectangle are regarded as equivalent.
This is meaningless if the window is not a rectangle.
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.
pairdist
,
pairdist.default
,
pairdist.psp
,
crossdist
,
nndist
,
Kest
data(cells)
d <- pairdist(cells)
d <- pairdist(cells, periodic=TRUE)
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