On Wed, 2005-04-20 at 10:35 +0200, Domenico Cozzetto wrote: > Dear all, > I'm trying to get a two dimensional embedding of some data using different > meythods, among which princomp(), cmds(), sammon() and isoMDS(). I have a > problem with sammon() because the coordinates I get are all equal to NA. > What does it mean? Why the method fails in finding the coordinates? Can I do > anything to get some meaningful results?
I'm sorry, but I can't reproduce your problem. I have tried hard with different tricks, but sammon() always gives good numeric results, or reports on the problems with the input and refuses to continue. For a starter: which sammon did you use. I think there may be three or four implementations in R with that name alone (and some variants may be names differently). I used sammon() in MASS (Venables & Ripley), and could not get NA. You need to give more details if you want to get help. cheers, jari oksanen -- Jari Oksanen <[EMAIL PROTECTED]> ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
