[R] Is DUD available in nls()?

[Jeff Newmiller]

a) Read the Posting Guide. It will tell you things like:
1) Don't post in HTML format. Adjust your email client appropriately.
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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 <send2aqi at 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
>
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>
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