Re: [R] Define lower-upper bound for parameters in Optim using Nelder-Mead method

2012-05-02 Thread Hans W Borchers
Ben Bolker bbolker at gmail.com writes: Ted.Harding at wlandres.net writes: In addition to these options, there is also a derivative-free box-constrained optimizer (bobyqa) in the 'minqa' package (and in an optim-like wrapper via the optimx package), and a box-constrained Nelder-Mead

Re: [R] Define lower-upper bound for parameters in Optim using Nelder-Mead method

2012-05-02 Thread Arnaud Mosnier
Thanks for this good idea ! Arnaud 2012/5/1 Ted Harding ted.hard...@wlandres.net On 01-May-2012 19:58:41 Arnaud Mosnier wrote: Dear UseRs, Is there a way to define the lower-upper bounds for parameters fitted by optim using the Nelder-Mead method ? Thanks, Arnaud The

[R] Define lower-upper bound for parameters in Optim using Nelder-Mead method

2012-05-01 Thread Arnaud Mosnier
Dear UseRs, Is there a way to define the lower-upper bounds for parameters fitted by optim using the Nelder-Mead method ? Thanks, Arnaud [[alternative HTML version deleted]] __ R-help@r-project.org mailing list

Re: [R] Define lower-upper bound for parameters in Optim using Nelder-Mead method

2012-05-01 Thread Thomas Lumley
On Wed, May 2, 2012 at 7:58 AM, Arnaud Mosnier a.mosn...@gmail.com wrote: Dear UseRs, Is there a way to define the lower-upper bounds for parameters fitted by optim using the Nelder-Mead method ? It depends a bit on whether it's plausible that the solution is on the boundary. If not, simply

Re: [R] Define lower-upper bound for parameters in Optim using Nelder-Mead method

2012-05-01 Thread Ted Harding
On 01-May-2012 19:58:41 Arnaud Mosnier wrote: Dear UseRs, Is there a way to define the lower-upper bounds for parameters fitted by optim using the Nelder-Mead method ? Thanks, Arnaud The Nelder-Mead method does not provide built-in capability to set bounds on the range of paramaters.

Re: [R] Define lower-upper bound for parameters in Optim using Nelder-Mead method

2012-05-01 Thread Ben Bolker
Ted.Harding at wlandres.net writes: On 01-May-2012 19:58:41 Arnaud Mosnier wrote: Dear UseRs, Is there a way to define the lower-upper bounds for parameters fitted by optim using the Nelder-Mead method ? Thanks, Arnaud The Nelder-Mead method does not provide built-in