Description Usage Arguments Details Value Author(s) See Also Examples

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

1 2 |

`X,Y` |
Point patterns in three dimensions (objects of class |

`...` |
Ignored. |

`periodic` |
Logical. Specifies whether to apply a periodic edge correction. |

`squared` |
Logical. If |

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 `crossdist`

for three-dimensional point patterns (objects of class `"pp3"`

).

This function expects two
point patterns `X`

and `Y`

, and returns the matrix
whose `[i,j]`

entry is the distance from `X[i]`

to
`Y[j]`

.

Alternatively if `periodic=TRUE`

, then provided the windows
containing `X`

and `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 `X`

to the `j`

-th point in `Y`

.

based on code for two dimensions by Pavel Grabarnik.

`crossdist`

,
`pairdist`

,
`nndist`

,
`G3est`

1 2 3 4 | ```
X <- runifpoint3(20)
Y <- runifpoint3(30)
d <- crossdist(X, Y)
d <- crossdist(X, Y, periodic=TRUE)
``` |

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