On Wed, 23 Jun 2004 [EMAIL PROTECTED] wrote: > Dear, R experts. > Does anybody have experience with 'optim' function?
Yes. > I have an error message as the following. > > Error in optim(transcoefs, fn = hfdeviance, gr = hfdeviance.grad, method > = "BFGS", : > initial value in vmmin is not finite > > I want to make a comment when this happen. Function 'fn' can return 'NA' or 'Inf' if the function cannot be evaluated at the supplied value, but the initial value must have a computable finite value of 'fn'. (Except for method '"L-BFGS-B"' where the values should always be finite.) It's your error so you can control it (by not making the error). > Is there way I can put *my* message after this error occur? You can use try/tryCatch and similar constructs. But it would be better to use a valid starting value as optim asks, and you can so that by calling hfdeviance(transcoefs) and checking it is finite. -- Brian D. Ripley, [EMAIL PROTECTED] 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 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html