# bdist.points

From spatstat v1.0-1
by Adrian Baddeley

##### Distance to Boundary of Window

Computes the distances from each point of a point pattern to the boundary of the window.

- Keywords
- spatial

##### Usage

`bdist.points(X)`

##### Arguments

- X
- A point pattern (object of class
`"ppp"`

).

##### Details

This function computes, for each point $x_i$
in the point pattern `X`

, the shortest distance
$d(x_i, W^c)$ from $x_i$
to the boundary of the window $W$ of observation.

If the window `X$window`

is of type `"rectangle"`

or `"polygonal"`

, then these distances are computed by
analytic geometry and are exact, up to rounding errors.
If the window is of type `"mask"`

then the distances
are computed using the real-valued distance transform,
which is an approximation with maximum error equal to the width
of one pixel in the mask.

##### Value

- A numeric vector, giving the distances from each point of the pattern to the boundary of the window.

##### See Also

##### Examples

```
library(spatstat)
data(cells)
d <- bdist.points(cells)
```

*Documentation reproduced from package spatstat, version 1.0-1, License: GPL version 2 or newer*

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