Hello, Rereading my first mail, I realized that my question might not have been clear enough: I'm trying to do a cluster analysis on age structures in certain areas of Belgium and France. For each spatial entity, I have the total number of inhabitants and the percentages by age group. I would like to do the analysis with the total number of inhabitants as the weight in distance and new group center calculations. Is this possible ? Moritz -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._