topic Proc PLS Response variable in SAS Procedures

Proc PLS Response variable

Daisy2 — Fri, 21 Feb 2020 23:38:07 GMT

For PLS does my Response (Y) need to be Normal? I’m wondering whether I need to use my transformed Y or is it OK to use the measured data with no transformation? Thanks.

Re: Proc PLS Response variable

Ksharp — Sat, 22 Feb 2020 05:32:39 GMT

No need to be normal and no need transformation .

PLS is totally different algorithm with Least Square algorithm .

Re: Proc PLS Response variable

PaigeMiller — Sat, 22 Feb 2020 12:29:30 GMT

But on the other hand, the Y variable cannot be binary or categorical, PLS doesn't work well that way (although I have done it).

Re: Proc PLS Response variable

Daisy2 — Mon, 24 Feb 2020 02:18:45 GMT

Thanks, I see that my X's need to be centered and scaled - is that right? If so, how do I do that?

Re: Proc PLS Response variable

Ksharp — Mon, 24 Feb 2020 02:51:35 GMT

Yes. It is true. SAS will do it for you . you don't need to do anything.

" be centered and scaled" is a part of PLS algorithm .

Re: Proc PLS Response variable

PaigeMiller — Mon, 24 Feb 2020 11:41:19 GMT

@Daisy2 wrote:
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.