[R] nls: Missing value or an Infinity produced when evaluating the model
angel_lul at hotmail.com
Wed Apr 23 14:29:44 CEST 2003
I am trying to fit a sigmoid curve to some data with nls but I am getting
into some trouble.
Seems that the optimization method is getting down to some parameter
estimates that make the equation unsolvable. This is an example:
56043.86 : 3.0 2500.0 1.5
Error in numericDeriv(form[], names(ind), env) :
Missing value or an Infinity produced when evaluating the model
Is there anyway I can restrict the parameter values used so it doesn't get
to this no return point.
Any other alternatives are also very welcome!
Thanks in advance,
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