djmuseR Sorry about that! I am using the mvtnorm package. I forgot that R has (so) many packages as it is has been a while since I last used R. Meddee -- View this message in context: http://r.789695.n4.nabble.com/Multivariate-Normal-Help-wanted-tp3779831p3780104.html Sent from the R help mailing list archive at Nabble.com.