[SciPy-dev] Trouble with optimize.fmin_ncg

Stefan van der Walt stefan@sun.ac...
Wed Jul 25 03:45:58 CDT 2007


The optimisation converges under scipy r3116:

$ python test_tnc.py 
try fmin_bfgs
Optimization terminated successfully.
         Current function value: 0.000540
         Iterations: 263
         Function evaluations: 266
         Gradient evaluations: 266
Rayleigh quotient BFGS 0.000540272922563
fmin_bfgs OK
try fmin_ncg
Optimization terminated successfully.
         Current function value: 0.000538
         Iterations: 13
         Function evaluations: 33
         Gradient evaluations: 13
         Hessian evaluations: 13
Rayleigh quotient NCG 0.000537952836927

Regards
Stéfan

On Tue, Jul 24, 2007 at 11:12:23PM -0400, Alan G Isaac wrote:
> On Tue, 24 Jul 2007, dmitrey apparently wrote:
> > can anyone who didn't update scipy from svn during last 
> > 10-11 days run Nils example? 
> 
> The core of Nil's example is below.
> Get the data from here:
> http://math.nist.gov/MatrixMarket/data/Harwell-Boeing/lanpro/nos4.html
> Cheers,
> Alan Isaac


More information about the Scipy-dev mailing list