See ?nls.control (referenced from ?nls). On 12/07/2012 18:47, Felipe Carrillo wrote:
Hi: Using nls how can I increase the numbers of iterations to go beyond 50. I just want to be able to predict for the last two weeks of the year. This is what I have:weight_random <- runif(50,1,24) weight <- sort(weight_random);weight weightData <- data.frame(weight,week=1:50) weightData plot(weight ~ week, weightData) M_model <- nls(weight ~ alpha + beta*exp(gamma*week), weightData, start = c(alpha = 0.0, beta = 1, gamma = 0.2), trace = TRUE) ### I get the error below: Error in nls(weight ~ alpha + beta * exp(gamma * week), weightData, start = c(alpha = 0, : number of iterations exceeded maximum of 50 M_model ### predict for another 2 weeks newD <- data.frame(week = 1:52);newD newD$pred_wt <- predict(M_model, newD) newD plot(pred_wt ~ week, newD, pch = 4, col = "red", ylab = "Weight", xlab = "Week") with(weightData, points(week, weight,col='blue')) Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish & Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx [[alternative HTML version deleted]] ______________________________________________ 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.
-- Brian D. Ripley, rip...@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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.
