[R] Is DUD available in nls()?
Hans W Borchers
hwborchers at googlemail.com
Tue Apr 2 14:37:37 CEST 2013
Bert Gunter <gunter.berton <at> gene.com> writes:
> I certainly second all Jeff's comments.
> **HOWEVER** :
> IIRC, DUD's provenance is old, being originally a BMDP feature.
Thanks for the pointer. That seems to be an interesting derivative-free
approach, specialized for least-squares problems. I will take a closer look,
as it might be a nice addition for the 'dfoptim' package for derivative-free
-- Hans Werner
Jeff Newmiller <jdnewmil <at> dcn.davis.ca.us> writes:
> a) Read the Posting Guide.
> b) Regarding your "DUD" algorithm, it doesn't sound familiar.
> There are many algorithms that don't use derivatives for optimization
> so it isn't clear that this is a referenceable label. The help file for
> nls mentions two algorithms that don't require derivatives. You might
> want to review the CRAN Task View on Optimization and Mathematical
> Programming if you want to know more about what is available in CRAN
> and base R.
qi A <send2aqi <at> gmail.com> writes:
> SAS has DUD (Does not Use Derivatives)/Secant Method for nonlinear
> regression, does R offer this option for nonlinear regression?
> I have read the helpfile for nls() and could not find such option, any
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