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.
