Given two samples x and y, perform a chisquare test for homogeneity of the null hypothesis that x and y come from the same distribution, based on the partition induced by the (strictly increasing) entries of c.
For large samples, the test statistic chisq approximately follows a chisquare distribution with df =
length (
c)
degrees of freedom.The p-value (1 minus the CDF of this distribution at chisq) is returned in pval.
If no output argument is given, the p-value is displayed.