[R] NLS "Singular Gradient" Error

[Gabor Grothendieck]

What does "no success" mean?

Some things to try are:

- since log(1-Ne/No)  is linear in Ne and run an lm(log(1-Ne/No) ~ Ne)
and then use the implied  values from that or use them as starting
values,

- reparameterize a*(b*Ne-T) to aa*Ne + bb and try nls on that


On Wed, Apr 28, 2010 at 9:13 AM, bsnrh <bsnrh at leeds.ac.uk> wrote:
>
> Thank you for your reply.
>
> The equation is derived from Juliano's chapter in Scheiner and Gurevitch
> (2001) on Functional Responses.
>
> I have tried calling T<-24 and rerunning with no success sadly.
> --
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