Probabilistic preferences of Likert scale data by empirical distributions

This R-code is intended for multicriteria decision support problems solved by the Composition of Probabilistic Preferences (CPP), created by Professor Annibal Parracho Sant´Anna. The two functions in this code calculate the joint probabilities of alternatives maximizing (PMax) and minimizing (PMin) their preferences in a criterion. The measures of the problem's decision matrix are the frequencies of responses to the Likert scale values collected by questionnaires