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.
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Sent from my phone. Please excuse my brevity.
qi A <send2...@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]]
>
>______________________________________________
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>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
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