[R] Problem on minima

Liaw, Andy andy_liaw at merck.com
Mon Sep 30 14:27:48 CEST 2002


... and optim() has simulated annealing.

Andy

> -----Original Message-----
> From: Kenneth Cabrera [mailto:krcabrer at epm.net.co]
> Sent: Sunday, September 29, 2002 8:09 AM
> To: E. D. Isaia
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] Problem on minima
> 
> 
> 
> Have you think in use genetic algoritms? (gafit package)
> 
> E. D. Isaia wrote:
> 
> >Dear List, I wonder if there is a package that may help me 
> in finding mimina of a specified function in 2 or more real variables.
> >Until now I used the optim() function and/or the nlr() one, 
> passing the function g() of interest and the initial guess 
> for the parameters to be optimized over, but it is rather 
> tricky as in my case the function g() may have one absolute 
> minimum and several relative minima which I'm interested in.
> >
> >-- 
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >~ Ennio D. Isaia
> >~ Dep. of Statistics & Mathematics, University of Torino
> >~ Piazza Arbarello, 8 - 10128 Torino (Italy)
> >~ Phone: +39 011 670 62 51 ~~ Fax: +39 011 670 62 39
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >  
> >
> > 
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.
> -.-.-.-.-.-.-.-.- 
> > r-help mailing list -- Read 
> > http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send 
> "info", "help", 
> > or "[un]subscribe" (in the "body", not the subject !) To: 
> > r-help-request at stat.math.ethz.ch 
> > 
> _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._.
> _._._._._._._._._ 
> 
> 
> 
> -- 
> Kenneth Roy Cabrera Torres
> Celular +57 (315) 405 9339
> 
> 
> 
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.
> -.-.-.-.-.-.-.-.-
> r-help mailing list -- Read 
> http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !)  To: 
> r-help-request at stat.math.ethz.ch
> _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._.
> _._._._._._._._._
> 


------------------------------------------------------------------------------
Notice:  This e-mail message, together with any attachments, contains information of Merck & Co., Inc. (Whitehouse Station, New Jersey, USA) that may be confidential, proprietary copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message.  If you are not the intended recipient, and have received this message in error, please immediately return this by e-mail and then delete it.

==============================================================================

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._



More information about the R-help mailing list