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 > 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

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

2012-05-02 Thread Hans W Borchers
Ben Bolker gmail.com> writes: > > 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 optimizer in the

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

2012-05-01 Thread Ben Bolker
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 ca

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 paramater

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 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 returning Inf

[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 https://stat.ethz.ch/mailman/li