Programming the statistical procedures from SAS

marquardt method

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Contributor
Posts: 58

marquardt method

Can anybody provide me the complete proc of marquardt method?

Community Manager
Posts: 2,842

Re: marquardt method

Without further details, I can guess only that you're looking at nonlinear regression (PROC NLIN) with METHOD=MARQUARDT for the fitting algorithm.  This community can provide much more help if you provide more details on the problem.  There is some basic guidance here in this doc from UCLA.  And some general overview of related procedures here.


Chris

SAS Super FREQ
Posts: 3,547

Re: marquardt method

The Marquardt least-squares optiomization method is available by using the NLPLM subroutine in SAS/IML.  The documentation of the NLPLM subroutine describes the algorithm as "an efficient modification of the trust-region method."

Contributor
Posts: 58

Re: marquardt method

Dearest sir,

Thank you for your kind reply.

I am a fisheries specialist and frequently use SAS for my statistics problems. In a research paper, I have studied about the modified form of Marquardt method. I want you to have look at this modified method (below link) and kindly provide me your comments and view over this modified form of Marquardt method ; that is it correct? Thanks alot

Program Summary - general model.pdf - Google Drive

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