# cut.im

From spatstat v1.21-0
by Adrian Baddeley

##### Convert Pixel Image from Numeric to Factor

Transform the values of a pixel image from numeric values into a factor.

##### Usage

```
## S3 method for class 'im':
cut(x, \dots)
```

##### Arguments

- x
- A pixel image.
An object of class
`"im"`

. - ...
- Arguments passed to
`cut.default`

. They determine the breakpoints for the mapping from numerical values to factor values. See`cut.default`

.

##### Details

This simple function applies the generic `cut`

operation
to the pixel values of the image `x`

. The range of pixel values
is divided into several intervals, and each
interval is associated with a level of a factor.
The result is another pixel image,
with the same window and pixel grid as
`x`

, but with the numeric value of each pixel discretised
by replacing it by the factor level.

This function is a convenient way to inspect an image and to obtain summary statistics. See the examples.

To select a subset of an image, use the subset operator
`[.im`

instead.

##### Value

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

) with pixel values that are a factor. See`im.object`

.

##### See Also

##### Examples

```
# artificial image data
Z <- setcov(square(1))
Y <- cut(Z, 3)
Y <- cut(Z, breaks=seq(0,1,length=5))
# cut at the quartiles
# (divides the image into 4 equal areas)
Y <- cut(Z, quantile(Z))
```

*Documentation reproduced from package spatstat, version 1.21-0, License: GPL (>= 2)*

### Community examples

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