Hello. Sorry if the question I'm asking is trivial but I'm unable to find the answer. How can I make a duncan test of multiple rank in R? That is, the designed test to see which mean levels are different in an one factor ANOVA. Thanks in advance, Arnau. ------------------------------------------------------------ Arnau Mir Torres Edifici A. Turmeda Campus UIB Ctra. Valldemossa, km. 7,5 07122 Palma de Mca. tel: (+34) 971172987 fax: (+34) 971173003 email: arnau.mir at uib.es URL: http://dmi.uib.es/~arnau