R help - Mar 2004 - Assessing Kappa values (was: Non-linear regression problem: R vs JMP (long))

Dear R-friends,

I've been able to induce R to fit the non-linear model in my previous post,
by
changing the tolerance to 0.475.  I've calculated the kappa of the gradient 
matrix from the model as being 2487.294.  Is that very large?  I cannot find 
any reference to a range of suitable values.  The matrix dimension is 875 x 
9.

Andrew
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