bagEarth

0th

Percentile

Bagged Earth

A bagging wrapper for multivariate adaptive regression splines (MARS) via the earth function

Keywords
regression
Usage
## S3 method for class 'formula':
bagEarth(formula, data = NULL, B = 50,
         summary = mean, keepX = TRUE,
         ..., subset, weights, na.action = na.omit) 
## S3 method for class 'default':
bagEarth(x, y, weights = NULL, B = 50, 
         summary = mean, keepX = TRUE, ...)
Arguments
formula
A formula of the form y ~ x1 + x2 + ...
x
matrix or data frame of 'x' values for examples.
y
matrix or data frame of numeric values outcomes.
weights
(case) weights for each example - if missing defaults to 1.
data
Data frame from which variables specified in 'formula' are preferentially to be taken.
subset
An index vector specifying the cases to be used in the training sample. (NOTE: If given, this argument must be named.)
na.action
A function to specify the action to be taken if 'NA's are found. The default action is for the procedure to fail. An alternative is na.omit, which leads to rejection of cases with missing values on any required variable. (N
B
the numebr of bootstrap samples
summary
a function with a single argument specifying how the bagged predictions should be summarized
keepX
a logical: should the original training data be kept?
...
arguments passed to the earth function
Details

The function computes a Earth model for each bootstap sample.

Value

  • A list with elements
  • fita list of B Earth fits
  • Bthe number of bootstrap samples
  • callthe function call
  • xeither NULL or the value of x, depending on the value of keepX
  • ooba matrix of performance estimates for each bootstrap sample

References

J. Friedman, ``Multivariate Adaptive Regression Splines'' (with discussion) (1991). Annals of Statistics, 19/1, 1-141.

See Also

earth, predict.bagEarth

Aliases
  • bagEarth
  • print.bagEarth
  • bagEarth.default
  • bagEarth.formula
Examples
library(mda)
library(earth)
data(trees)
fit1 <- earth(trees[,-3], trees[,3])
fit2 <- bagEarth(trees[,-3], trees[,3], B = 10)
Documentation reproduced from package caret, version 4.25, License: GPL-2

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