On Wed, 2010-06-02 at 20:29 +0200, Jimmy Söderly wrote: > Dear R users, > > After running Sweave, this is what I get : > > Warning messages: > 1: glm.fit: algorithm did not converge > 2: glm.fit: algorithm did not converge > There is no glm.fit function in my code.
glm calls glm.fit did you call glm() or any code that might use glm() (or glm.fit()). glm.fit() is the function that does the actual model fitting etc, with glm() being a convenience wrapper providing the formula interface etc. > Where does it come from ? From Sweave ? From system.time ? Your call to glm() or any function that calls glm(). This is nothing to sweave or system.time. Your model fitting has failed to converge. There may be many reasons why glm.fit is failing to converge for the model your are fitting. Either extract the R code or tangle the sweave file to do the extraction, and then step through the code to see where the warning is being generated. Then figure out why glm.fit is not converging (you might need to up the number of iterations or provide better starting values or rethink the type of model you are trying to fit). HTH G -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ 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.
