earth (version 0.1-2)

get.nused.preds.per.subset: Number of predictors in an 'earth' object

Description

Get the number of predictors in a model which is a subset of an earth model.

Usage

get.nused.preds.per.subset(dirs, which.terms)

Arguments

dirs

dirs component of an earth object.

which.terms

Typically the selected.terms or prune.terms component of an earth object.

Value

• The number of predictors used in the model specified by which.terms. If which.terms is a matrix such as prune.terms, the value is a vector.

See Also

earth, get.nterms.per.degree,

Examples

data(ozone1)
a <- earth(O3 ~ ., data = ozone1, degree = 2)
get.nused.preds.per.subset(a$dirs, a$selected.terms)

# yields:
#    [1] 8     # there are 8 predictors in selected.terms

get.nused.preds.per.subset(a$dirs, a$prune.terms)

# yields:
#    [1] 0 1 2 3 4 4 5 6 7 7 8 8 8 8 8 8 8 8 8 8 8