# rotate.owin

From spatstat v1.41-1
by Adrian Baddeley

##### Rotate a Window

Rotates a window

##### Usage

```
## S3 method for class 'owin':
rotate(X, angle=pi/2, \dots, rescue=TRUE, centre=NULL)
```

##### Arguments

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

). - angle
- Angle of rotation.
- rescue
- Logical. If
`TRUE`

, the rotated window will be processed by`rescue.rectangle`

. - ...
- Optional arguments passed to
`as.mask`

controlling the resolution of the rotated window, if`X`

is a binary pixel mask. Ignored if`X`

is not a binary mask. - centre
- Centre of rotation.
Either a vector of length 2, or a character string
(partially matched to
`"centroid"`

,`"midpoint"`

or`"bottomleft"`

). The default is the coordinate origin`c(0,0)`

.

##### Details

Rotates the window by the specified angle. Angles are measured in
radians, anticlockwise. The default is to rotate the window 90 degrees
anticlockwise. The centre of rotation is the origin, by default,
unless `centre`

is specified.

##### Value

- Another object of class
`"owin"`

representing the rotated window.

##### See Also

##### Examples

```
w <- owin(c(0,1),c(0,1))
v <- rotate(w, pi/3)
e <- rotate(w, pi/2, centre="midpoint")
plot(v)
w <- as.mask(letterR)
v <- rotate(w, pi/5)
```

*Documentation reproduced from package spatstat, version 1.41-1, License: GPL (>= 2)*

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