See nlme::fdHess
HTH, Giovanni > Date: Mon, 12 May 2008 18:18:57 +0100 > From: Carlo Fezzi <[EMAIL PROTECTED]> > Sender: [EMAIL PROTECTED] > Precedence: list > Thread-index: Aci0VENEgf84jUE7T0mEusn0OTj4AA== > > 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. > > > -- Giovanni Petris <[EMAIL PROTECTED]> Associate Professor Department of Mathematical Sciences University of Arkansas - Fayetteville, AR 72701 Ph: (479) 575-6324, 575-8630 (fax) http://definetti.uark.edu/~gpetris/ ______________________________________________ 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.
