Hi Rhys On Wed, 24 Nov 2010 09:52:24 -0600 Rhys Ulerich <[email protected]> wrote:
> >> why the interpolating routines become extrapolating sometimes? > >> Today I spent several hours to find the stupid bug in my program > >> due to interpolation bounds violation. When an interpolation > >> point becomes greater than right bound or lower than left then no > >> error returns but the routine extrapolates a function value to > >> that point giving very brave values. > > > That sounds like a good idea, to just hardcode an error for values > > outside the range, > > Any chance that you'll break everyone who depended on this > extrapolation "feature"? Such a check seems like an easy thing for > the library user to do when/if it makes sense. I think no chance. This check has already done in gsl_interp_eval_e and related procs with _e suffix. It is strange not to do it in others. In addition, it it necessary to clean situation with error codes returning from interpolation procedures, when the code is GSL_FAILURE in cspline_eval_deriv and deriv2, and the code is GSL_EINVAL in linear_eval_deriv. I'll send the patch in a coming days when rake an urgent tasks. Regards, Evgeny Kurbatov > > - Rhys > _______________________________________________ Bug-gsl mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-gsl
