wmtest

WM-test. The method uses the Wilcoxon–Mann–Whitney rank-order test.

% input:
% - x1 (vector), the first sample
% - x2 (vector), the second sample
% - alpha, alpha (or significance) level
% - tail ({'left','right','both'}), type of alternative hypothesis
% output:
% - p, p-value
% - h, hypothesis test result