# methods.fii

##### Methods for Fitted Interactions

These are methods specifically for the class `"fii"`

of
fitted interpoint interactions.

##### Usage

```
## S3 method for class 'fii':
print(x, \dots)
```## S3 method for class 'fii':
coef(object, \dots)

## S3 method for class 'fii':
plot(x, \dots)

## S3 method for class 'fii':
summary(object,\dots)

## S3 method for class 'summary.fii':
print(x, ...)

## S3 method for class 'summary.fii':
coef(object, ...)

##### Arguments

- x,object
- An object of class
`"fii"`

representing a fitted interpoint interaction. - ...
- Arguments passed to other methods.

##### Details

These are methods for the class `"fii"`

.
An object of class `"fii"`

represents a fitted interpoint
interaction. It is usually obtained by
using the command `fitin`

to extract the fitted
interaction part of a fitted point process model.
See `fitin`

for further explanation of this class.
The commands listed here are methods for the generic functions
`print`

,
`summary`

,
`plot`

and
`coef`

for objects of the class `"fii"`

.

Following the usual convention, `summary.fii`

returns an object of class
`summary.fii`

, for which there is a print method.
The effect is that, when the user types `summary(x)`

,
the summary is printed, but when the user types `y <- summary(x)`

,
the summary information is saved.

The method `coef.fii`

extracts the canonical coefficients of
the fitted interaction, and returns them as a numeric vector.
The method `coef.summary.fii`

transforms these values into
quantities that are more easily interpretable, in a format that
depends on the particular model.
There are also methods for the generic commands `reach`

and
`as.interact`

, described elsewhere.

##### Value

- The
`print`

and`plot`

methods return`NULL`

.The

`summary`

method returns an object of class`summary.fii`

.`coef.fii`

returns a numeric vector.`coef.summary.fii`

returns data whose structure depends on the model.

##### See Also

##### Examples

```
mod <- ppm(cells, ~1, Strauss(0.1))
f <- fitin(mod)
f
summary(f)
plot(f)
coef(f)
coef(summary(f))
```

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