[R] nls: singular convergeance

[Rolf Turner]

On 14/10/11 11:39, Redding, Matthew wrote:
> Hi Rolf and Others,
>
> Thanks Rolf for your suggestion.
> I've had a look at segmented, but can't see how it can help.
>
> My model is the solution to an ODE of a physical system. The fitted
> parameters from
> this model are the answers I require.
>
> I'm not sure how segmented can help -- it is
> a linear regression tool. Can you let me know how it could be used?

No I can't. You said you were trying to fit a "broken stick" model,
which is what the "segmented" package does.  If you are not
fitting a model to data, then I have no idea as to how you might
proceed.

You have to make it much more clear what you are trying to do
before I (or anyone) can make constructive suggestions.

     cheers,

         Rolf Turner