On Jan 13, 2013, at 3:23 PM, Pooyan Rahimy wrote: > > Dear Jim hello, > > I have the same question as the one you had :https://stat.ethz.ch/pipermail/r-help/2005-May/070681.html > > did you find any answer to that? There was a link on that page to an answer. -- David Winsemius Alameda, CA, USA