Hi, friends, I'm using "DPdensity" package in R to analyze my data (N=1000). The given examples in that package ran pretty good. But when I applied it to my data set, it keeps saying "matrix is not pd in chol subroutine". Is there anyone has ever used such package can share some ideas? Thank you very much, The package link is given below: http://cran.r-project.org/web/packages/DPpackage/DPpackage.pdf Jay -- View this message in context: http://r.789695.n4.nabble.com/Help-in-Dirichlet-Process-density-estimation-tp2999100p2999100.html Sent from the R help mailing list archive at Nabble.com.