pairdist
From spatstat v1.4-5
by Adrian Baddeley
Pairwise distances
Computes the matrix of distances between all pairs of points in a point pattern.
- Keywords
- spatial
Usage
pairdist(x, y=NULL, method="C")
Arguments
- x,y
- Arguments specifying the $x$ and $y$ coordinates of
a set of points. Typically
x
andy
would be numeric vectors of equal length. Alternativelyy
may be omitted andx
may be a point patter - method
- String specifying which method of calculation to use.
Values are
"C"
and"interpreted"
.
Details
This function computes the Euclidean distances between all pairs of points, and returns the matrix of distances.
If method = "interpreted"
then the distances are
computed using interpreted R code only. If method="C"
then C code is used. The C code is marginally faster.
Value
- A square matrix whose
[i,j]
entry is the distance between the points numberedi
andj
.
See Also
Examples
x <- runif(100)
y <- runif(100)
d <- pairdist(x, y)
data(cells)
d <- pairdist(cells)
Community examples
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