"crossdist"(X, Y, x2, y2, ..., period=NULL, method="C", squared=FALSE)"C" and "interpreted".
squared=TRUE, the squared distances are
returned instead (this computation is faster).
[i,j] entry is the distance
from the i-th point in the first set of points
to the j-th point in the second set of points.
This is a method for the generic function crossdist.
This function expects X and Y to be numeric vectors
of equal length specifying the coordinates of the first set of points.
The arguments x2,y2 specify the coordinates of the
second set of points.
Alternatively if period is given,
then the distances will be computed in the `periodic'
sense (also known as `torus' distance).
The points will be treated as if they are in a rectangle
of width period[1] and height period[2].
Opposite edges of the rectangle are regarded as equivalent.
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 faster by a factor of 4.
crossdist,
crossdist.ppp,
crossdist.psp,
pairdist,
nndist,
Gest
d <- crossdist(runif(7), runif(7), runif(12), runif(12))
d <- crossdist(runif(7), runif(7), runif(12), runif(12), period=c(1,1))
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