virtual double ObjectiveGradient(RCRVector xy, RVector &grad, whichO which){
++numeval;
switch (which) {
case GRADIENT_ONLY:
case OBJECTIVE_AND_GRADIENT:
return my_func((unsigned) xy.GetLength(), xy.raw_data_const(), grad.raw_data(), my_data);
case OBJECTIVE_ONLY:
return my_func((unsigned) xy.GetLength(), xy.raw_data_const(), NULL, my_data);
}
return 0.0;
}
