And it could be that you should try nlmrt or minpack.lm.
I don't think you were at my talk in Jena May 23 -- might have been very
helpful to you.
JN
On 13-06-20 06:00 AM, r-help-request at r-project.org
wrote:> Message: 47
> Date: Wed, 19 Jun 2013 13:17:29 -0500
> From: "Adams, Jean"<jvadams at usgs.gov>
> To: pakoun<pkount at bgc-jena.mpg.de>
> Cc: R help<r-help at r-project.org>
> Subject: Re: [R] nls singular gradient ..as always..
> Message-ID:
> <CAN5YmCEF9Ut5J-Zqh6URYOn0bfH=M=cUGMgDmtzy9OwWkrw24A at
mail.gmail.com>
> Content-Type: text/plain
>
> It's hard to say without seeing the data. It could be the data, it
could
> be the starting values, it could be the model choice.
>
> Jean
