# bdist.points

##### Distance to Boundary of Window

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

##### 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 `Window(X)`

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

```
# NOT RUN {
data(cells)
d <- bdist.points(cells)
# }
```

*Documentation reproduced from package spatstat, version 1.55-1, License: GPL (>= 2)*