model.frame {base}

R Documentation

Extracting the “Environment” of a Model Formula

Description

model.frame is a generic function, and model.frame.default its default method.

Usage

model.frame(formula, data, na.action, ...)
model.frame.default(formula, data=sys.frame(sys.parent()), 
                    na.action = na.fail, ...)

Arguments

formula	a model formula
data	data.frame or environment where the objects in formula are.
na.action	how NAs are treated.
...	further arguments such as.......

Value

A data.frame containing the variables used in formula.

See Also

model.frame.lm for the method used in lm.

Examples

data(cars)
data.class(model.frame(dist ~ speed, data = cars))

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