# pairdist.lpp

##### Pairwise shortest-path distances between points on a linear network

Given a pattern of points on a linear network, compute the matrix of distances between all pairs of points, measuring distance by the shortest path in the network.

- Keywords
- spatial

##### Usage

```
# S3 method for lpp
pairdist(X, ..., method="C")
```

##### Arguments

- X
Point pattern on linear network (object of class

`"lpp"`

).- method
Optional string determining the method of calculation. Either

`"interpreted"`

or`"C"`

.- …
Ignored.

##### Details

Given a pattern of points on a linear network, this function computes the matrix of distances between all pairs of points, measuring distance by the shortest path in the network.

If `method="C"`

the distances are computed using
code in the C language. If `method="interpreted"`

then the
computation is performed using interpreted R code. The R code is
much slower, but is provided for checking purposes.

If two points cannot be joined by a path,
the distance between them is infinite (`Inf`

).

##### Value

A symmetric matrix, whose values are nonnegative numbers or infinity
(`Inf`

).

##### See Also

##### Examples

```
# NOT RUN {
X <- runiflpp(12, simplenet)
pairdist(X)
# }
```

*Documentation reproduced from package spatstat, version 1.57-1, License: GPL (>= 2)*