Earl F. Glynn <efg <at> stowers-institute.org> writes: > > Here's my toy problem: > > ?nls.control > > ?nls > > # Method 2 > > X <- 0:15 > > Y <- 9.452 * exp(-0.109*X) + 5.111 # Toy problem > > > > nls.out <- nls(Y ~ a*exp(b*X)+c, > + start=list(a=6,b=-0.5,c=1), > + control=nls.control(maxiter=15, tol=0.01), # nothing makes > sense here > + trace=TRUE)
This toy problem is exactly what the warning is for: Warning Do not use nls on artificial "zero-residual" data. Add some noise and try again. Dieter Menne ______________________________________________ R-help@stat.math.ethz.ch 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.
