Re: PCA: R-Matrix Determinant =0 and "not positive Definite"

Posted by David Marso on Jun 24, 2011; 2:16pm
URL: http://spssx-discussion.165.s1.nabble.com/PCA-R-Matrix-Determinant-0-and-not-positive-Definite-tp4512844p4521132.html

Autocorrelation, Seasonality... to name a few reasons (Google these concepts and while you are at it ARIMA models and related things).  If you are "new to stats" you are out of your depth trying to work with this.  There are many people "trained" in statistics who would make a mess of this analysis!
Confused re your level of observation.  You say you have some 15? sites and some 41? measures on each, daily for several years.  But your N is for each day.  Are these measures averages across the 15 sites?
There are MANY complex issues in data analysis which are going to bite you on the a__ here.

mzalikhan wrote

Thanks David for your comments as well as sharing your views. I would be thankful to you if you kindly share the reasons which make you conclude that the analysis is going to be a mess?

Peace.