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

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))