The type of resource matrix, which can be absolulte, relative, relative_antecedent or relative_consequent. Absolute will return
a matrix with absolute frequencies, relative will return global relative frequencies for all antecedent-consequent pairs.
Relative_antecedent will return relative frequencies within each antecendent, i.e. showing the relative proportion of consequents within each antecedent. Relative_consequent will do the reverse.