function [cram,pears,stat] = freqcontg(X,sig)
// Contingency table
// X ... data marix of absolute frequencies
// sig ... significance level of association (default 0.05)
// stat ... chi-square computed stat. and quantil [computed tabulated]
// pears ... Pearson's contingency coefficient
// cram ... Cramer's V
// Author: Lukáš Malec
// Date: $2016-01-12$
