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Re: Error message when using NonlinearRegress

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96965] Re: Error message when using NonlinearRegress
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Sat, 28 Feb 2009 06:43:06 -0500 (EST)

On 2/27/09 at 6:17 AM, cdneish at lpl.arizona.edu (Catherine Neish)
wrote:

>I have been encountering an error message when using
>NonlinearRegress that I have not seen before:

>"FindFit::fmmp: Machine precision is insufficient to achieve the
>requested accuracy or precision."

>My question is, can I still trust the fit it gives me?

The best answer any one can give based on the information
provided is maybe.

>Or, how would I go about finding a fit that doesn't give this error messag=
e?

Try increasing the working precision and the precision of your input.

=46or more definitive and useful answers, you need to provide
details of what you are doing preferably with the code you are using.




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