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 <bs...@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. > -- > View this message in context: > http://r.789695.n4.nabble.com/NLS-Singular-Gradient-Error-tp2069029p2069149.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.
