# summary.ppm

From spatstat v1.24-1
by Adrian Baddeley

##### Summarizing a Fitted Point Process Model

`summary`

method for class `"ppm"`

.

##### Usage

```
## S3 method for class 'ppm':
summary(object, \dots, quick=FALSE)
## S3 method for class 'ppm':
print.summary(x, \dots)
```

##### Arguments

- object
- A fitted point process model.
- ...
- Ignored.
- quick
- Logical flag controlling the scope of the summary.
- x
- Object of class
`"summary.ppm"`

as returned by`summary.ppm`

.

##### Details

This is a method for the generic `summary`

for the class `"ppm"`

. An object of class `"ppm"`

describes a fitted point process model. See `ppm.object`

)
for details of this class.
`summary.ppm`

extracts information about the
type of model that has been fitted, the data to which the model was
fitted, and the values of the fitted coefficients.
(If `quick=TRUE`

then only the information about the type
of model is extracted.)

`print.summary.ppm`

prints this information in a
comprehensible format.

In normal usage, `print.summary.ppm`

is invoked implicitly
when the user calls `summary.ppm`

without assigning its value
to anything. See the examples.

##### Value

`summary.ppm`

returns an object of class`"summary.ppm"`

, while`print.summary.ppm`

returns`NULL`

.

##### Examples

```
# invent some data
X <- rpoispp(42)
# fit a model to it
fit <- ppm(X, ~x, Strauss(r=0.1))
# summarize the fitted model
summary(fit)
# `quick' option
summary(fit, quick=TRUE)
# save the full summary
s <- summary(fit)
# print it
print(s)
s
# extract stuff
names(s)
s$args$correction
s$name
s$trend$value
# multitype pattern
data(demopat)
fit <- ppm(demopat, ~marks, Poisson())
summary(fit)
# model with external covariates
fitX <- ppm(X, ~Z, covariates=list(Z=function(x,y){x+y}))
summary(fitX)
```

*Documentation reproduced from package spatstat, version 1.24-1, License: GPL (>= 2)*

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