# edges

From spatstat v1.42-2
by Adrian Baddeley

##### Extract Boundary Edges of a Window.

Extracts the boundary edges of a window and returns them as a line segment pattern.

##### Usage

`edges(x, ..., window = NULL, check = FALSE)`

##### Arguments

- x
- A window (object of class
`"owin"`

), or data acceptable to`as.owin`

, specifying the window whose boundary is to be extracted. - ...
- Ignored.
- window
- Window to contain the resulting line segments.
Defaults to
`as.rectangle(x)`

. - check
- Logical. Whether to check the validity of the resulting segment pattern.

##### Details

The boundary edges of the window `x`

will be extracted as a line
segment pattern.

##### Value

- A line segment pattern (object of class
`"psp"`

).

##### See Also

`perimeter`

for calculating the total length of the boundary.

##### Examples

```
edges(square(1))
edges(letterR)
```

*Documentation reproduced from package spatstat, version 1.42-2, License: GPL (>= 2)*

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