On 02-04-2012, at 20:48, Jeff Breiwick wrote: > Hello, > > I am running a simple nls model (which a friend ran OK) but I get the > following error: > > Error in nls(y ~ R * (1 - (x/K)^2), data = nls.dat, start = list(R = 0.3, : > object 'R_nls_iter' not found > > Does anyone know what the 'R_nls_iter' error is? > > The data are: > x=1:8 ; y=c(14,19,25,34,43,56,69,76) > # starting values: > R=.3, K=94
No Os, no R version, no context, no reproducible example. So I tried this: x <- 1:8 y <- c(14,19,25,34,43,56,69,76) # starting values: R <- .3 K <- 94 nls.dat <- data.frame(x=x, y=y) nls(y ~ R * (1 - (x/K)^2), data = nls.dat, start = list(R = 0.3, K=94)) and got this > nls(y ~ R * (1 - (x/K)^2), data = nls.dat, start = list(R = 0.3, K=94)) Error in nls(y ~ R * (1 - (x/K)^2), data = nls.dat, start = list(R = 0.3, : RMate stopped at line 0 singular gradient Execution halted Berend R2.15.0, Mac OS X 10.6.8 ______________________________________________ [email protected] 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.
