Dear helpers, I am using the function "constrOptim" to estimate a model with ML with an inequality constraint using the option method='Nelder-Mead'.
When I specify the option: hessian = TRUE I obtain the response: Error in f(theta, ...) : unused argument(s) (hessian = TRUE) I guess the function "constrOptim" does not allow this argument which, on the other hand, is allowed in "optim". I would be extremely grateful if anybody could suggest a way I could use to I obtain the values of the hessian matrix... Many thanks, Carlo ************************************************** Carlo Fezzi Senior Research Associate Centre for Social Research on the Global Environment (CSERGE) Department of Environmental Sciences University of East Anglia Norwich (UK) NR2 7TJ Telephone: +44(0)1603 591408 Fax: +44(0)1603 593739 ______________________________________________ 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.
