# hist.funxy

##### Histogram of Values of a Spatial Function

Computes and displays a histogram of the values of a spatial function
of class `"funxy"`

.

##### Usage

```
# S3 method for funxy
hist(x, …, xname)
```

##### Arguments

##### Details

This function computes and (by default) displays a histogram
of the values of the function `x`

.

An object of class `"funxy"`

describes a function of spatial location. It is a `function(x,y,..)`

in the R language, with additional attributes.

The function `hist.funxy`

is a method for the generic
function `hist`

for the class `"funxy"`

.

The function is first converted to a pixel image using `as.im`

,
then `hist.im`

is called to produce the histogram.

Any arguments in `...`

are passed to `as.im`

to determine the pixel resolution,
or to `hist.im`

to determine the histogram breaks
and to control or suppress plotting.
Useful arguments include `W`

for the spatial domain,
`eps,dimyx`

for pixel resolution, `main`

for the main title.

##### Value

An object of class `"histogram"`

as returned
by `hist.default`

. This object can be
plotted.

##### See Also

`spatialcdf`

for the cumulative distribution function
of an image or function.

For other statistical graphics such as Q-Q plots,
use `as.im(X)[]`

to extract the pixel values of image `X`

,
and apply the usual statistical graphics commands.

##### Examples

```
# NOT RUN {
f <- funxy(function(x,y) {x^2}, unit.square())
hist(f)
# }
```

*Documentation reproduced from package spatstat, version 1.56-1, License: GPL (>= 2)*