DEFUN_DLD(GSL_OCTAVE_NAME, args, nargout, "\
  -*- texinfo -*-\n\
@deftypefn {Loadable Function} {@var{y} =} GSL_OCTAVE_NAME (@var{n})\n\
@deftypefnx {Loadable Function} {[@var{y}, @var{err}] =} GSL_OCTAVE_NAME (@dots{})\n\
\n\
GSL_FUNC_DOCSTRING
\n\
@var{err} contains an estimate of the absolute error in the value @var{y}.\n\
\n\
This function is from the GNU Scientific Library,\n\
see @url{http://www.gnu.org/software/gsl/} for documentation.\n\
@end deftypefn\n\
")
{
    int i;
    
    gsl_set_error_handler (octave_gsl_errorhandler);
    
    if(args.length() != 1) {
	print_usage ();
	return octave_value();
    }
    if(!args(0).is_real_type()) {
        error("The argument must be real.");
	print_usage ();	    
	return octave_value();
    }

    NDArray x = args(0).array_value();
    NDArray y(x.dims());
    int lx = x.length();
//    printf("length: %d\n", lx);
//    printf("nargout: %d\n", nargout);
    if(nargout < 2) {
	for(i = 0; i < lx; i++) {
	    y.xelem(i) = GSL_FUNC_NAME (static_cast<int>(x.xelem(i)));
	}
	return octave_value(y);	    
    } else {
	NDArray err(x.dims());
	gsl_sf_result result;
	octave_value_list retval;
	for(i = 0; i < lx; i++) {
	    GSL_FUNC_NAME_e (static_cast<int>(x.xelem(i)), &result);
	    y.xelem(i) = result.val;
	    err.xelem(i) = result.err;
	}
	retval(1) = octave_value(err);
	retval(0) = octave_value(y);
	return retval;
    }

    return octave_value_list();

}


/*
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;;; mode: C++ ***
;;; End: ***
*/