Good eveninig, I work on R and i want to do an MCA but, i find difficulty in calculating the contribution (CTR), cosine(CO2), coord(CORD) and distancefrom the center of the modalities of variables. Please help me how to calculate these values. In fact, when i enter the variables it writes "variable not found" Thank you Housseima _________________________________________________________________ Hotmail : un service de messagerie gratuit, fiable et complet [[alternative HTML version deleted]]