# summary.earth

##### Summary method for earth objects

Summary method for `earth`

objects.

- Keywords
- models

##### Usage

```
# S3 method for earth
summary(object = stop("no 'object' argument"),
details = FALSE, style = c("h", "pmax", "max", "C", "bf"),
decomp = "anova", digits = getOption("digits"), fixed.point=TRUE,
newdata = NULL, …)
```# S3 method for summary.earth
print(x = stop("no 'x' argument"),
details = x$details,
decomp = x$decomp, digits = x$digits, fixed.point = x$fixed.point,
newdata = x$newdata, …)

##### Arguments

- object
An

`earth`

object. This is the only required argument for`summary.earth`

.- x
A

`summary.earth`

object. This is the only required argument for`print.summary.earth`

.- details
Default is

`FALSE`

. Use`TRUE`

to print more information about`earth`

--`glm`

models. But note that the displayed P-values of the GLM coefficients are meaningless because of the amount of preprocessing by earth to select the regression terms.- style
Formatting style. One of

`"h"`

(default) more compact`"pmax"`

for those who prefer it and for compatibility with old versions of earth`"max"`

is the same as`"pmax"`

but prints`max`

rather than`pmax`

`"C"`

C style expression with zero based indexing`"bf"`

basis function format.- decomp
Specify how terms are ordered. Default is

`"anova"`

. Use`"none"`

to order the terms as created by the forward.pass. See`format.earth`

for a full description.- digits
The number of significant digits. For

`summary.earth`

, the default is`getOption("digits")`

. For`print.summary.earth`

, the default is the`$digits`

component of`object`

.- fixed.point
Method of printing numbers in matrices. Default is

`TRUE`

which prints like this (making it easier to compare coefficients):(Intercept) 15.029 h(temp-58) 0.313 h(234-ibt) -0.046 ...

whereas

`fixed.point=FALSE`

prints like this (which is more usual in R):(Intercept) 1.5e+01 h(temp-58) 3.1e-01 h(234-ibt) -4.6e-02 ...

Matrices with two or fewer rows are never printed with a fixed point.

- newdata
Default

`NULL`

. Else print R-Squared for the new data (and the returned object will have`newrsq`

and`newdata`

fields). Additionally, if a variance model is present print the interval coverage table for the new data.- …
Extra arguments are passed to

`format.earth`

.

##### Value

The value is the same as that returned by `earth`

but with the following extra components.

String(s) created by `format.earth`

.
For multiple response models, a vector of strings.

Only if `newdata`

was passed to `summary.earth`

.

Only if `newdata`

was passed to `summary.earth`

.

The corresponding arguments, passed on to `print.summary.earth`

.

##### Note

The printed `Estimated importance`

uses `evimp`

with the `nsubsets`

criterion.
The most important predictor is printed first, and so on.

##### See Also

##### Examples

```
# NOT RUN {
earth.mod <- earth(Volume~ ., data = trees)
summary(earth.mod, digits = 2)
# }
```

*Documentation reproduced from package earth, version 4.6.0, License: GPL-3*