Re: [Rd] constrained optimization

2010-07-08 Thread Jelmer Ypma
As far as I know, the reference describing the algorithm is: A. Wächter and L. T. Biegler. On the implementation of a primal-dual interior point filter line search algorithm for large-scale nonlinear programming. Mathematical Programming, 106(1):25-57, 2006. There are more references here: http://

Re: [Rd] constrained optimization

2010-07-08 Thread Christophe Dutang
Dear Paul, No I haven't tried to use L-BFGS-B algorithm with bounds. Let me check if a variable change can be used on my problem. Thanks Christophe Le 7 juil. 2010 à 19:49, Paul Bailey a écrit : > > Have you considered using the optim function with L-BFGS-B for bounded > optimization. Obviou

Re: [Rd] constrained optimization

2010-07-07 Thread Dominick Samperi
On Wed, Jul 7, 2010 at 1:49 PM, Paul Bailey wrote: > > Have you considered using the optim function with L-BFGS-B for bounded > optimization. Obviously, you will have to do changes of variables so that > everything is in terms of a rectangle (which is the type of bounding that > it > accepts). >

Re: [Rd] constrained optimization

2010-07-07 Thread Paul Bailey
Have you considered using the optim function with L-BFGS-B for bounded optimization. Obviously, you will have to do changes of variables so that everything is in terms of a rectangle (which is the type of bounding that it accepts). I believe it is based on "A LIMITED MEMORY ALGORITHM FOR BOUND CO

Re: [Rd] constrained optimization

2010-07-07 Thread Christophe Dutang
; > Best, > Ravi. > > -Original Message- > From: Paul Gilbert [mailto:pgilb...@bank-banque-canada.ca] > Sent: Wednesday, July 07, 2010 9:18 AM > To: Ravi Varadhan; Christophe Dutang > Subject: RE: [Rd] constrained optimization > > Ravi > > I think you

Re: [Rd] constrained optimization

2010-07-07 Thread Christophe Dutang
Thank you Jelmer, I have just spent five minutes on the website, but I'm not sure to understand which method is implemented. Is it *this method? On the Implementation of a Primal-Dual Interior Point Filter Line Search Algorithm for Large-Scale Nonlinear Programming* Do you plan to put lpopt on CR

Re: [Rd] constrained optimization

2010-07-07 Thread Ravi Varadhan
Subject: [Rd] constrained optimization Dear list, The task view on optimization does not reference a package for non linear constrained optimization problems. Stefan Theussl told me to look at the Rsolnp package, but unfortunately it is not very clear what method is R ported. (The authors ported the

[Rd] constrained optimization

2010-07-07 Thread Christophe Dutang
Dear list, The task view on optimization does not reference a package for non linear constrained optimization problems. Stefan Theussl told me to look at the Rsolnp package, but unfortunately it is not very clear what method is R ported. (The authors ported the matlab code of Yinyu Ye http://www.s