Thanks, I see that my X's need to be centered and scaled - is that right? If so, how do I do that?
They don't "need to be" scaled, but that's usually the way PLS is run. However, there are valid reasons why you might not want to scale the x-variables in some scenarios. So PROC PLS gives you the choice of using scaling, which is the default, or not scaling, which is the NOSCALE option.
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