Summary method for earth objects.
# 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, ...)
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.
An earth object.
This is the only required argument for summary.earth.
A summary.earth object.
This is the only required argument for print.summary.earth.
Default is FALSE.
Use TRUE
to print more information about earth--glm models.
But note that the displayed Standard Errors and statistics for the
GLM coefficients are meaningless (because of the amount of preprocessing
done by earth to select the regression terms).
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.
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.
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.
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.
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.
earth,
evimp,
format.earth
earth.mod <- earth(Volume~ ., data = trees)
summary(earth.mod, digits = 2)
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