I certainly second all Jeff's comments.

**HOWEVER** :
http://www.tandfonline.com/doi/pdf/10.1080/00401706.1978.10489610

IIRC, DUD's provenance is old, being originally a BMDP feature.

-- Bert

On Mon, Apr 1, 2013 at 10:59 AM, Jeff Newmiller <jdnewmil@dcn.davis.ca.us>wrote:

> a) Read the Posting Guide. It will tell you things like:
> 1) Don't post in HTML format. Adjust your email client appropriately.
> 2) Don't repost. Your emails are all there, looking silly next to each
> other.
> 3) Use the search facilities yourself, such as RSiteSearch().
>
> 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.
> ---------------------------------------------------------------------------
> Jeff Newmiller                        The     .....       .....  Go Live...
> DCN:<jdnewmil@dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live
> Go...
>                                       Live:   OO#.. Dead: OO#..  Playing
> Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
> /Software/Embedded Controllers)               .OO#.       .OO#.  rocks...1k
> ---------------------------------------------------------------------------
> Sent from my phone. Please excuse my brevity.
>
> qi A <send2aqi@gmail.com> wrote:
>
> >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
> >suggestion?
> >
> >Thanks,
> >
> >Derek
> >
> >       [[alternative HTML version deleted]]
> >
> >______________________________________________
> >R-help@r-project.org mailing list
> >https://stat.ethz.ch/mailman/listinfo/r-help
> >PLEASE do read the posting guide
> >http://www.R-project.org/posting-guide.html
> >and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 

Bert Gunter
Genentech Nonclinical Biostatistics

Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm

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