summary.earth {earth} | R Documentation |
Summary method for earth
objects.
## 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, ...)
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.
|
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 pmax "bf" basis function format.
|
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. |
... |
Extra arguments are passed to format.earth .
|
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 .
|
The printed Estimated importance
uses evimp
with the nsubsets
criterion.
The most important predictor is printed first, and so on.
a <- earth(Volume~ ., data = trees) summary(a, digits = 2) # yields: # Call: earth(formula=Volume~., data=trees) # # Volume # (Intercept) 23.21 # h(Girth-12.9) 5.75 # h(12.9-Girth) -2.87 # h(Height-76) 0.72 # # Selected 4 of 5 terms, and 2 of 2 predictors # Estimated importance: Girth Height # Number of terms at each degree of interaction: 1 3 (additive model) # GCV 11 RSS 213 GRSq 0.96 RSq 0.97