Wilcoxon Test December 12, 2013, 09:30:20 AM Dear all,For some reasons i have to perform a wilcoxon test instead of student-t test. If i understood well, the package multtest is able to do it...But i can't figure how to modify the xcmsSet object to be readable by mt.teststat(myXcmsSetobject, classlabel, test="wilcoxon",nonpara="y"). For classlabel if I specify the sampclass of the XcmsSetobject it doesn't work so i think it's the main problem.I hope I am clear enough... :oops: Many thanks in advance for your help ! Quote Selected