Re: nonparametric PCA

2000-02-18 Thread Jan de Leeuw
There are various forms of "nonlinear" PCA, which transform the variables nonlinearly in such a way that there is maximal data reduction in a fixed dimensionality. For instance: transform the variables nonlinearly in such a way that the sum of the two largest eigenvalues of the correlation matrix

Another Test of EdStat -- Can Be Ignored

2000-02-18 Thread Donald Macnaughton
This is another test message to help us understand the behavior of the EdStat list server. Donald Macnaughton === This list is open to everyone. Occasionally, people lacking respect for other members of the list send me

nonparametric PCA

2000-02-18 Thread Stefan Debener
First of all, Hi to everybody out there, I am knew on this list. To cut my story short, I would like to know if there is any way to run a nonparametric PCA. The electrophysiological data I am working with are usually ln or sqrt transformed to normalize distribution. However, this procedure does no

introstat-l (long)

2000-02-18 Thread dennis roberts
This post is rather long, sorry. I have started a new listserv ... called INTROSTAT-L ... that will be housed here at Penn State, and uses the list server lists.psu.edu. Here is a brief explanation of what the purpose of the list is, and information about who the list has been primarily design