Hi Tom, I am not entirely sure what the problem, you haven't been very specific. If you want general linear constraints on your parameters, ie linear combinations of parameters summing to some value, constrOptim may be of help.
hth, ingmar Ingmar Visser Developmental Processes Research Group Department of Psychology University of Amsterdam http://users.fmg.uva.nl/ivisser/ -----Original Message----- From: [EMAIL PROTECTED] on behalf of Tom Stone Sent: Mon 7/26/2004 4:57 PM To: [EMAIL PROTECTED] Subject: [R] choosing constraints for function optim method="L-BFGS-B" whenthey are in terms of other parameter values I have a function of several variables which I wish to minimise over four variables, two of the upper bounds for which are defined in terms of other variables in the model over which minimisation will take place. I cannot work out how to code this in such a way as to avoid getting an error message when I run the code. If anyone can provide any assistance I will be most grateful. Best Regards Tom Stone ______________________________________________ [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 ______________________________________________ [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
