# crossdist.ppx

0th

Percentile

##### Pairwise Distances Between Two Different Multi-Dimensional Point Patterns

Computes the distances between pairs of points taken from two different multi-dimensional point patterns.

Keywords
spatial, math
##### Usage
## S3 method for class 'ppx':
crossdist(X, Y, \dots)
##### Arguments
X,Y
Multi-dimensional point patterns (objects of class "ppx").
...
Arguments passed to coords.ppx to determine which coordinates should be used.
##### Details

Given two point patterns in multi-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 crossdist for three-dimensional point patterns (objects of class "ppx").

This function expects two multidimensional point patterns X and Y, and returns the matrix whose [i,j] entry is the distance from X[i] to Y[j]. By default, both spatial and temporal coordinates are extracted. To obtain the spatial distance between points in a space-time point pattern, set temporal=FALSE.

##### Value

• A matrix whose [i,j] entry is the distance from the i-th point in X to the j-th point in Y.

crossdist, pairdist, nndist

##### Aliases
• crossdist.ppx
##### Examples
df <- data.frame(x=runif(3),y=runif(3),z=runif(3),w=runif(3))
X <- ppx(data=df)
df <- data.frame(x=runif(5),y=runif(5),z=runif(5),w=runif(5))
Y <- ppx(data=df)
d <- crossdist(X, Y)
Documentation reproduced from package spatstat, version 1.25-5, License: GPL (>= 2)

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