# pairdist

From spatstat v1.3-4
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`

and`y`

would be numeric vectors of equal length. Alternatively`y`

may be omitted and`x`

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 numbered`i`

and`j`

.

##### See Also

##### Examples

```
x <- runif(100)
y <- runif(100)
d <- pairdist(x, y)
data(cells)
d <- pairdist(cells)
```

*Documentation reproduced from package spatstat, version 1.3-4, License: GPL version 2 or newer*

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