You asked another question about clustering, so I presume you want to standardize some variables before clustering. In SAS, PROC STDIZE offers 18 standardization methods. See http://support.sas.com/91doc/getDoc/statug.hlp/stdize_sect12.htm#stat_stdize_stdizesm for details. If you're really concerned about this I would suggest running simulations to compare the performance of various standardization methods (relative to your data and what you're after).
hth, b. -----Original Message----- From: Philip Bermingham [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 18, 2005 8:34 AM To: [email protected] Subject: [R] standardization SAS Enterprise Miner recommendeds to standardize using X / STDEV(X) versus [X – mean(X)] / STDEV(X) Any thoughts on this? Pros Cons Philip ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
