# rotate.owin

##### Rotate a Window

Rotates a window

##### Usage

```
# S3 method for owin
rotate(X, angle=pi/2, …, 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

```
# NOT RUN {
w <- owin(c(0,1),c(0,1))
v <- rotate(w, pi/3)
e <- rotate(w, pi/2, centre="midpoint")
# }
# NOT RUN {
plot(v)
# }
# NOT RUN {
w <- as.mask(letterR)
v <- rotate(w, pi/5)
# }
```

*Documentation reproduced from package spatstat, version 1.62-2, License: GPL (>= 2)*