Computes the complete disjunctive table of a set of factors, where each factor (ie categorical variable) is encoded as a set of dummy variables, one for each level (category).
cdt(x)
A matrix
of dummy variables, with nrow(x)
rows and a
number of columns equal to the sum of numbers of levels in all the
variables of x
.
data.frame
on which the table is computed. All columns will
be treated as factors.