I suggest you consult a local statistician. You are (way) over your head statistically here, and statistical matters are off topic on this list. The brief answer to your question is: you are almost certainly producing nonsense.
Cheers, Bert Bert Gunter "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." -- Clifford Stoll On Thu, Jul 16, 2015 at 4:35 PM, Brittany Demmitt <demmi...@gmail.com> wrote: > Hello, > > I have a series of 40 variables that I am trying to transform via the boxcox > method using the powerTransfrom function in R. I have no zero values in any > of my variables. When I run the powerTransform function on the full data set > I get the following warning. > > Warning message: > In sqrt(diag(solve(res$hessian))) : NaNs produced > > However, when I analyze the variables in groups, rather than all 40 at a time > I do not get this warning message. Why would this be? And does this mean > this warning is safe to ignore? > > I would like to add that all of my lambda values are in the -5 to 5 range. I > also get different lambda values when I analyze the variables together versus > in groups. Is this to be expected? > > Thank you so much! > > Brittany > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.