Maybe you are applying a completely inappropriate model such as would be the case if Ne/No is not strictly between 0 and 1. All we can do is guess unless you provide a reproducible example which means that if we paste it in from your post it will give the same errors you see.
aa means aa, not a*a. On Wed, Apr 28, 2010 at 10:08 AM, bsnrh <bs...@leeds.ac.uk> wrote: > > No success means that I was not successful in changing the outputed error. It > had no effect on the model. > > Thank you for your suggestions; > > The first returns this error; > "Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : > NA/NaN/Inf in foreign function call (arg 4)" > > I don't understand your reasoning behind the second suggestion, but assuming > you mean "a*a*Ne + b*b" and not "aa*Ne + bb" the following error occurs; > "Error in numericDeriv(form[[3L]], names(ind), env) : > Missing value or an infinity produced when evaluating the model" > > Many thanks, > -- > View this message in context: > http://r.789695.n4.nabble.com/NLS-Singular-Gradient-Error-tp2069029p2069263.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
