| model.frame {base} | R Documentation |
model.frame (generic function) and its methods return a
data.frame with the variables from formula.
model.frame(formula, data, na.action, ...)
model.frame.default(formula, data=sys.frame(sys.parent()),
na.action = na.fail, ...)
Methods for
lm glm aovlist
formula |
a model formula |
data |
data.frame or environment where the objects
in formula are. |
na.action |
how NAs are treated. |
drop.unused.levels |
show factors have unused levels dropped?
Defaults to FALSE. |
xlev |
a named list of character vectors giving the full set of levels to be assumed for each factor. |
... |
further arguments such as subset and
weights. NULL arguments are treated as missing. |
A data.frame containing the variables used in
formula.
model.matrix for the ``design matrix''.
data(cars) data.class(model.frame(dist ~ speed, data = cars))