Dear Sir/Madam, Am using mt.teststat function from 'multtest' package. My variable to 'classlabel' argument having 'NA'.I tried to get rid of this by using na=.mt.naNUM. But this parameter is not working. I understood from help file that this haven't fully implemented yet. Could yo suggest any other way to solve this problem? Thanks in advance Gireesh Kumar [[alternative HTML version deleted]]