# shift.im

##### Apply Vector Translation To Pixel Image

Applies a vector shift to a pixel image

##### Usage

```
## S3 method for class 'im':
shift(X, vec=c(0,0), ..., origin=NULL)
```

##### Arguments

- X
- Pixel image (object of class
`"im"`

). - vec
- Vector of length 2 representing a translation.
- ...
- Ignored
- origin
- Character string determining a location
that will be shifted to the origin. Options are
`"centroid"`

,`"midpoint"`

and`"bottomleft"`

. Partially matched.

##### Details

The spatial location of each pixel in the image
is translated by the vector `vec`

.
This is a method for the generic function `shift`

.

If `origin`

is given, then it should be one of the character
strings `"centroid"`

, `"midpoint"`

or `"bottomleft"`

.
The argument `vec`

will be ignored; instead the shift will be performed
so that the specified geometric location is shifted to the origin.
If `origin="centroid"`

then the centroid of the image window will be
shifted to the origin. If `origin="midpoint"`

then the centre of
the bounding rectangle of the image will be shifted to the origin.
If `origin="bottomleft"`

then the bottom left corner of the
bounding rectangle of the image will be shifted to the origin.

##### Value

- Another pixel image (of class
`"im"`

) representing the result of applying the vector shift.

##### See Also

##### Examples

```
# make up an image
X <- setcov(unit.square())
plot(X)
Y <- shift(X, c(10,10))
plot(Y)
# no discernible difference except coordinates are different
shift(X, origin="mid")
```

*Documentation reproduced from package spatstat, version 1.18-1, License: GPL (>= 2)*