which.dummy {dummies} | R Documentation |
Given a data frame and an optional variable name,
which.dummy
identifies which colummns are dummy variables
by the column index.
which.dummy(data, name=NULL)
data |
An object with a 'dummies' attribute |
name |
Optional. The name of a column that has been expanded to a dummy variable. |
Given a data frame and an optional variable name, returns the indices of the dummy columns.
Requires an dummies
attribute, usually created by
dummy.data.frame
.
integer vector of column indices corresponding to the dummy variable(s)
Christopher Brown
data(iris) dat <- dummy.data.frame(iris) which.dummy(dat)