> Hi, i upgraded from openSuse 11.3 to 12.1 and got a new gsl version.... > > But now i'm getting always error messages "interp.c:150: ERROR: interpolation > error". I think it's because i want y values for x > values lower/bigger than the x values in my interpolation points. How can i > get these values? I don't want to add additional > interpolation points because that will change my spline.
Changed in http://bzr.savannah.gnu.org/lh/gsl/trunk/revision/4704. Judging from the line GSL_ERROR_VAL("interpolation error", GSL_EDOM, GSL_NAN); within interp.c, I don't think you can get the older, extrapolating behavior. The related mailing list thread discussing the change was here: http://lists.gnu.org/archive/html/bug-gsl/2010-11/msg00010.html Your options seem to be: 1) Don't extrapolate. 2) Hack your local version of the code to remove the extrapolation check. 3) Use some basic facts about splines to write an extrapolation-friendly version which defers to the library version. Sorry, Rhys _______________________________________________ Help-gsl mailing list Help-gsl@gnu.org https://lists.gnu.org/mailman/listinfo/help-gsl
