At Fri, 23 May 2008 11:44:55 -0600,
Sanjay Bhatnagar wrote:
> if ((a-alpha)*fpa <= GSL_DBL_EPSILON) {
> /* roundoff prevents progress */
> fprintf(stderr,"linear min. no prog: %e %e %e
> %e\n",a,alpha,fpa,GSL_DBL_EPSILON);
> return GSL_ENOPROG;
> };
>
> The message printed was:
>
> linear min. no prog: 1.498441e-01 1.498441e-01 3.012037e-02 2.220446e-16
>
> Does anyone know what could be wrong?
a == alpha (?) Take a look further up in the code where alpha (the
iterpolated minimum) is computed. Apparently the interpolation is
failing to move away from the point "a".
--
Brian Gough
GNU Scientific Library -
http://www.gnu.org/software/gsl/
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