Try port algorithm. Please provide complete reproducible code and data when posting.
> y <- 1/(x <- 1:5) > nls(y~k/x^n, start=list(k=1, n=1), algorithm = "port") Nonlinear regression model model: y ~ k/x^n data: parent.frame() k n 1 1 residual sum-of-squares: 0 Algorithm "port", convergence message: both X-convergence and relative convergence (5) On Jan 23, 2008 2:58 PM, Jarek Jasiewicz <[EMAIL PROTECTED]> wrote: > Hi! > > How to write in model's formula of type: > > nls(y~k/(x^n), data=data, start=list(k=1,n=1)) > i.e the problem is on x^n, I(x^n) generate error > > thanks > Jarek ______________________________________________ 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.
