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Documentation on Weighting in Nonlinear Platform

andreacoombs

I have a customer that is writing up a GMP validation protocol on an analysis where Weighting is used in the Nonlinear platform. He needs to document the formula for how weighting is applied. He is confident that he is getting the correct result as he has verified with another tool he just would like help with the formula and neither of us could find it in the documentation or on the community. The response is a mean and he is weighting by 1/sqrt(SD).

-Andrea

Accepted answers

andreacoombs

The response from Duane in Tech Support:

Nonlinear models with weight columns in JMP are handled similarly to how SAS handles weights in PROC NLIN. Here is the doc for NLIN. There, you need to define the _WEIGHT_ variable.

As an example, I have attached an example data table containing both the SAS code as well as the JMP Nonlinear script.

US Population_weight.jmp

All comments

mia_stephens

Thanks for your post @andreacoombs. For items like this, it's probably best to submit (or ask the customer to submit) to tech support (support@jmp.com). They'll share available information/references, and/or create a Jira for the doc team if needed.

andreacoombs

Thanks @mia_stephens . Was following the protocol that Ryan Gilmore recently posted. I will go to Tech Support next.

jiancao

Andrea,

I had a customer asking about the weighted NLN in JMP. Specifically, his question was about the nonlinear least squares. Below is a screen shot of my message (it might not be detailed enough but I wanted to share it with you):

When a loss function is used JMP uses the Newton-Raphson algorithm, please see https://www.jmp.com/support/help/en/16.1/#page/jmp/how-custom-loss-functions-work.shtml#ww289310 )

andreacoombs

Thanks @jiancao - Where did you get the information in the screenshot? from documentation or tech support?

jiancao

This was my reply to the user using WORD (for typing equations and functions). I learned that in school :-).

andreacoombs

The response from Duane in Tech Support:

Nonlinear models with weight columns in JMP are handled similarly to how SAS handles weights in PROC NLIN. Here is the doc for NLIN. There, you need to define the _WEIGHT_ variable.

As an example, I have attached an example data table containing both the SAS code as well as the JMP Nonlinear script.

US Population_weight.jmp