perm

Function that permutate the values of a group of variables. Note that all the variables of the group are permuted together in order to keep the relationship between variables within the group.

perm(oobsamples, data, num_group, group)

Arguments

oobsamples	a vector containing the indices of the observations that are not included in the sample used to build the modified CARTGV tree.
data	a data frame containing all observation included in the training data set.
num_group	index of the considered group
group	a vector with the group number of each variable. (WARNING : if there are "p" goups, the groups must be numbers from "1" to "p" in increasing order. The group label of the response variable is missing (i.e. NA)).

Value

data_perm a data frame obtained after permuting the values of the considered group for observation belonging to the out-of-bag sample.