# density.splitppp

##### Kernel Smoothed Intensity of Split Point Pattern

Compute a kernel smoothed intensity function for each of the components of a split point pattern, or each of the point patterns in a list.

##### Usage

```
## S3 method for class 'splitppp':
density(x, \dots, se=FALSE)
``` ## S3 method for class 'ppplist':
density(x, \dots, se=FALSE)

##### Arguments

- x
- Split point pattern (object of class
`"splitppp"`

created by`split.ppp`

) to be smoothed. Alternatively a list of point patterns, of class`"ppplist"`

. - ...
- Arguments passed to
`density.ppp`

to control the smoothing, pixel resolution, edge correction etc. - se
- Logical value indicating whether to compute standard errors as well.

##### Details

This is a method for the generic function `density`

.

The argument `x`

should be a list of point patterns,
and should belong to one of the classes
`"ppplist"`

or `"splitppp"`

.
Typically `x`

is obtained by applying
the function `split.ppp`

to a point pattern `y`

by calling `split(y)`

. This splits the points of `y`

into several
sub-patterns.
A kernel estimate of the intensity function of each of the
point patterns is computed using `density.ppp`

.

The return value is usually a list, each of whose entries is a
pixel image (object of class `"im"`

). The return value
also belongs to the class `"solist"`

and can be plotted
or printed.

If the argument `at="points"`

is given, the result is a list
of numeric vectors giving the intensity values at the data points.

If `se=TRUE`

, the result is a list with two elements named
`estimate`

and `SE`

, each of the format described above.

##### Value

- A list of pixel images (objects of class
`"im"`

) which can be plotted or printed; or a list of numeric vectors giving the values at specified points.If

`se=TRUE`

, the result is a list with two elements named`estimate`

and`SE`

, each of the format described above.

##### See Also

##### Examples

```
Z <- density(split(amacrine), 0.05)
plot(Z)
```

*Documentation reproduced from package spatstat, version 1.42-2, License: GPL (>= 2)*