earth (version 2.5-1)

summary.earth: Summary method for "earth" objects

Description

Summary method for earth objects.

Usage

## S3 method for class 'earth':
summary(object = stop("no 'object' arg"),
        details = FALSE, decomp = "anova",
        style = c("h", "pmax", "max", "bf"),
        digits = getOption("digits"), fixed.point=TRUE, ...)
## S3 method for class 'summary.earth':
print(x = stop("no 'x' arg"),
        details = x$details, decomp = x$decomp,
        digits = x$digits, fixed.point = x$fixed.point, ...)

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 mean

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.

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

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 fixe

...

Extra arguments are passed to format.earth.

Value

• The value is the same as that returned by earth but with the following extra components.
• strings
  String(s) created by format.earth. For multiple response models, a vector of strings.
• digits
• details
• decomp
• fixed.point
  The corresponding arguments, passed on to print.summary.earth.

See Also

earth, evimp, format.earth

Examples

a <- earth(Volume~ ., data = trees)
summary(a, digits = 2)

# yields:
#    Call: earth(formula=Volume~., data=trees)
#
#                 coefficients
#    (Intercept)         27.25
#    h(Girth-14)          6.18
#    h(14-Girth)         -3.27
#    h(Height-72)         0.49
#
#    Selected 4 of 6 terms, and 2 of 2 predictors
#    Importance: Girth, Height
#    Number of terms at each degree of interaction: 1 3 (additive model)
#    GCV 11    RSS 197    GRSq 0.96    RSq 0.98