# distmap

##### Distance Map

Compute the distance map of an object, and return it as a pixel image. Generic.

##### Usage

`distmap(X, …)`

##### Arguments

- X
Any suitable dataset representing a two-dimensional object, such as a point pattern (object of class

`"ppp"`

), a window (object of class`"owin"`

) or a line segment pattern (object of class`"psp"`

).- …
Arguments passed to

`as.mask`

to control pixel resolution.

##### Details

The “distance map” of a set of points \(A\) is the function
\(f\) whose value `f(x)`

is defined for any two-dimensional
location \(x\) as the shortest distance from \(x\) to \(A\).

This function computes the distance map of the set `X`

and returns the distance map as a pixel image.

This is generic. Methods are provided for
point patterns (`distmap.ppp`

),
line segment patterns (`distmap.psp`

)
and windows (`distmap.owin`

).

##### Value

A pixel image (object of class `"im"`

) whose grey scale values
are the values of the distance map.

##### See Also

##### Examples

```
# NOT RUN {
data(cells)
U <- distmap(cells)
data(letterR)
V <- distmap(letterR)
# }
# NOT RUN {
plot(U)
plot(V)
# }
```

*Documentation reproduced from package spatstat, version 1.63-3, License: GPL (>= 2)*