Hi, I need to test multiple correlation coefficient in a same time, what's the best test for that and are should I do under R ? Thanks -- Cordialement ---------------------------------------- Emmanuel POIZOT Cnam/Intechmer Digue de Collignon 50110 Tourlaville Tél : (33)(0)2 33 88 73 42 Fax : (33)(0)2 33 88 73 39 -----------------------------------------