Produce a Design Matrix from a ‘mars’ Object

Description

Produce a design matrix from a ‘mars’ object.

Usage

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## S3 method for class 'mars'
model.matrix(object, x, which, full = FALSE, ...)

Arguments

object

a mars object.

x

optional argument; if supplied, the mars basis functions are evaluated at these new observations.

which

which columns should be used. The default is to use the columns described by the component selected.terms on object.

full

if TRUE the entire set of columns are selected, even redundant ones. This is used for updating a mars fit.

...

further arguments to be passed from or to methods.

Value

A model matrix corresponding to the selected columns.

See Also

mars, predict.mars