# methods.fii

##### Methods for Fitted Interactions

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

of
fitted interpoint interactions.

##### Usage

```
# S3 method for fii
print(x, …)
```# S3 method for fii
coef(object, …)

# S3 method for fii
plot(x, …)

# S3 method for fii
summary(object,…)

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

# S3 method for 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

```
# NOT RUN {
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 1.55-1, License: GPL (>= 2)*