# cut.im

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

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

##### Usage

```
# S3 method for im
cut(x, …)
```

##### 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

```
# NOT RUN {
# 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 1.63-3, License: GPL (>= 2)*