Luis, See the fastICA package, in particular the final example in the function fastICA's help page. This doesn't leave you with density estimates, but with projection-pursuit directions; you still have to figure out how to fit a density estimate to the rotated data. Actually, as I understand it, XGobi also finds directions but does not fit a density. However, any multivariate density estimator ought to be applicable. I'm not aware at the moment of the tools R offers for multivariate density estimation, but I'm sure there are multiple possibilities.
_The Elements of Statistical Learning_ by Hastie, Tibshirani, and Friedman mention a "trick" to use classification tools (which model class probabilities) to estimate density. Fundamentally, generate data from a reference distribution, and use the classification tool to estimate probability of observed data (as opposed to generated data) as a function of the inputs. These probabilities, normalized to integrate to 1, form a density estimate. Since there are so very many classification tools available, this trick offers a lot of flexibility. Good luck. Jim Garrett Baltimore, Maryland, USA ********************************************************************** This message is intended only for the designated recipient(s...{{dropped}} ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html