I actually did think they were decimal :). Everything works fine now, thanks a million for your help. And sorry for taking your time with something that was actually a result of my carelessness... Kuba Fast -- OnetKomunikator - porozumiesz sie z innymi [ http://ok.onet.pl/instaluj.html ] -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- 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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._