Pairwise distances between two different three-dimensional point patterns
Computes the distances between pairs of points taken from two different three-dimensional point patterns.
## S3 method for class 'pp3': crossdist(X, Y, \dots, periodic=FALSE, squared=FALSE)
- Point patterns in three dimensions (objects of class
- Logical. Specifies whether to apply a periodic edge correction.
- Logical. If
squared=TRUE, the squared distances are returned instead (this computation is faster).
Given two point patterns in three-dimensional space, this function computes the Euclidean distance from each point in the first pattern to each point in the second pattern, and returns a matrix containing these distances.
This is a method for the generic function
for three-dimensional point patterns (objects of class
This function expects two
Y, and returns the matrix
[i,j] entry is the distance from
periodic=TRUE, then provided the windows
Y are identical and are rectangular,
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.
- A matrix whose
[i,j]entry is the distance from the
i-th point in
j-th point in
X <- runifpoint3(20) Y <- runifpoint3(30) d <- crossdist(X, Y) d <- crossdist(X, Y, periodic=TRUE)