[R] PCA and Regression with complex categorical variables

2011-10-24 Thread seanstclair
__ R-help@r-project.org mailing list 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.

Re: [R] PCA and Regression with complex categorical variables

2011-10-21 Thread David Winsemius
Did you perhaps send an HTML message? As detailed in the Posting Guide, those get scrubbed by the mail-server. On Oct 21, 2011, at 10:48 AM, seanstcl...@verizon.net wrote: -- David Winsemius, MD West Hartford, CT __ R-help@r-project.org mailing li

[R] PCA and Regression with complex categorical variables

2011-10-21 Thread seanstclair
__ R-help@r-project.org mailing list 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.

Re: [R] PCA and Regression

2010-07-06 Thread Joris Meys
PCA components are orthogonal by definition so no, that doesn't make sense at all. Do yourself a favor and get a book on multivariate data analysis. Two books come to mind: Obviously the one of Hair and colleagues, called "multivariate data analysis" and easily found in a university library (or on

[R] PCA and Regression

2010-07-06 Thread Marino Taussig De Bodonia, Agnese
Hello, I am currently analyzing responses to questionnaires about general attitudes. I have performed a PCA on my data, and have retained two Principal Components. Now I would like to use the scores of both the principal comonents in a multiple regression. I would like to know if it makes sense