[R] center or scale before analyzing using pls.pcr

[Jinsong Zhao]

Dear all,

I found pls.pcr package will give different results if the data are
centered and scaled using scale().

I am not sure about when I should scale my data, and whether the
dependent variable should be scaled. If the dependent variable is
scaled, how I give a prediction to the real data?

I appreciate for any suggestions and comments.

Best regards,

Jinsong


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(Mr.) Jinsong Zhao
Ph.D. Candidate
School of the Environment
Nanjing University
22 Hankou Road, Nanjing 210093
P.R. China
E-mail: jinsong_zh at yahoo.com