3 messages · Erin Hodgess, Duncan Murdoch, Uwe Ligges
Dear R People: I know that you can use "optim" for a function with several parameters. Is there an equivalent for 2 functions, please? Or should I put together a finite difference type of matrix, etc., please? Thanks, Happy New Year, Erin
Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodgess at gmail.com
Dear R People: I know that you can use "optim" for a function with several parameters. Is there an equivalent for 2 functions, please? Or should I put together a finite difference type of matrix, etc., please?
What is the goal? optim optimizes a scalar value. If you have a length 2 vector to "optimize", what does that mean? Duncan Murdoch
Thanks, Happy New Year, Erin
On 01/01/2010 11:45 PM, Erin Hodgess wrote:
Dear R People: I know that you can use "optim" for a function with several parameters. Is there an equivalent for 2 functions, please? Or should I put together a finite difference type of matrix, etc., please?
What is the goal? optim optimizes a scalar value. If you have a length 2 vector to "optimize", what does that mean?
Just a guess: If you want to optimize a 2 dim vector, you are probably doing some multi criterial optimization and you are looking for pareto optimality, right? In that case, you might be interested in package "mco" for "Multi criteria optimization algorithms and related functions" Best wishes, Uwe
Duncan Murdoch
Thanks, Happy New Year, Erin
______________________________________________ R-help at 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.