/*-----------------------------------------------------------*/ void NOMAD::LH_Search::search ( NOMAD::Mads & mads , int & nb_search_pts , bool & stop , NOMAD::stop_type & stop_reason , NOMAD::success_type & success , bool & count_search , const NOMAD::Eval_Point *& new_feas_inc , const NOMAD::Eval_Point *& new_infeas_inc ) { new_feas_inc = new_infeas_inc = NULL; nb_search_pts = 0; success = NOMAD::UNSUCCESSFUL; count_search = !stop; if ( stop ) return; // initial display: const NOMAD::Display & out = _p.out(); NOMAD::dd_type display_degree = out.get_search_dd(); if ( display_degree == NOMAD::FULL_DISPLAY ) { std::ostringstream oss; oss << NOMAD::LH_SEARCH; out << std::endl << NOMAD::open_block ( oss.str() ) << std::endl; } // active barrier: const NOMAD::Barrier & barrier = mads.get_active_barrier(); // Evaluator_Control: NOMAD::Evaluator_Control & ev_control = mads.get_evaluator_control(); // current incumbents: const NOMAD::Eval_Point * feas_inc = barrier.get_best_feasible (); const NOMAD::Eval_Point * infeas_inc = barrier.get_best_infeasible(); // get a reference point and a signature: const NOMAD::Eval_Point * ref = (feas_inc) ? feas_inc : infeas_inc; NOMAD::Signature * signature = _p.get_signature(); // check the number of points: int p = _initial_search ? _p.get_LH_search_p0() : _p.get_LH_search_pi(); if ( p <= 0 ) { if ( display_degree == NOMAD::FULL_DISPLAY ) { std::ostringstream oss; oss << "end of LH " << ( _initial_search ? "initial " : "") << "search (number of points <= 0)"; out << std::endl << NOMAD::close_block ( oss.str() ) << std::endl; } return; } // no reference point is available (we consider the standard signature): if ( !ref ) { // it is not sufficient with categorical variables: if ( signature->has_categorical() ) { if ( display_degree == NOMAD::FULL_DISPLAY ) { std::ostringstream oss; oss << "end of LH " << ( _initial_search ? "initial " : "") << "search (no available reference point)"; out << std::endl << NOMAD::close_block ( oss.str() ) << std::endl; } return; } } else signature = ref->get_signature(); // Change Display stats style const std::list<std::string> old_ds = _p.get_display_stats(); std::list<std::string> ds = old_ds; ds.push_back ( " (LH)" ); _p.set_DISPLAY_STATS ( ds ); // check the parameters: _p.check ( false , // remove_history_file = false false , // remove_solution_file = false false ); // remove_stats_file = false int i; NOMAD::Eval_Point * x; int n = signature->get_n(); int m = _p.get_bb_nb_outputs(); int pm1 = p-1; // mesh size: NOMAD::Point delta_max = signature->get_mesh()->get_delta_max (); NOMAD::Double delta_i; NOMAD::Point delta; if ( !_initial_search ) signature->get_mesh()->get_delta ( delta ); // fixed variables: const NOMAD::Point & fixed_variables = signature->get_fixed_variables(); // bb input types: const std::vector<NOMAD::bb_input_type> & bbit = signature->get_input_types(); // bounds: const NOMAD::Point & lb = signature->get_lb(); const NOMAD::Point & ub = signature->get_ub(); // pts contains n points of dimension p: each of these points contains // p different values for each variable: NOMAD::Point ** pts = new NOMAD::Point * [n]; // creation of p search points: for ( int k = 0 ; k < p ; ++k ) { x = new NOMAD::Eval_Point ( n , m ); x->set_signature ( signature ); for ( i = 0 ; i < n ; ++i ) { if ( k==0 ) { if ( fixed_variables[i].is_defined() ) pts[i] = new NOMAD::Point ( p , fixed_variables[i] ); else if ( bbit[i] == NOMAD::CATEGORICAL ) { pts[i] = new NOMAD::Point ( p , (*ref)[i] ); } else { pts[i] = new NOMAD::Point ( p ); if ( !_initial_search ) delta_i = delta[i]; values_for_var_i ( p , delta_i , delta_max[i] , bbit [i] , lb [i] , ub [i] , *pts [i] ); } } (*x)[i] = (*pts[i])[k]; if ( k == pm1 ) delete pts[i]; } if ( display_degree == NOMAD::FULL_DISPLAY ) { out << "LH point #" << x->get_tag() << ": ( "; x->Point::display ( out , " " , 2 , NOMAD::Point::get_display_limit() ); out << " )" << std::endl; } // add the new point to the ordered list of search trial points: ev_control.add_eval_point ( x , display_degree , false , // snap_to_bounds = false NOMAD::Double() , NOMAD::Double() , NOMAD::Double() , NOMAD::Double() ); } delete [] pts; nb_search_pts = ev_control.get_nb_eval_points(); // eval_list_of_points: // -------------------- new_feas_inc = new_infeas_inc = NULL; ev_control.eval_list_of_points ( _type , mads.get_true_barrier() , mads.get_sgte_barrier() , mads.get_pareto_front() , stop , stop_reason , new_feas_inc , new_infeas_inc , success ); _p.get_display_stats(); // restore stats style _p.set_DISPLAY_STATS ( old_ds ); _p.check ( false , // remove_history_file = false false , // remove_solution_file = false false ); // remove_stats_file = false // final displays: if ( display_degree == NOMAD::FULL_DISPLAY ) { std::ostringstream oss; oss << "end of LH search (" << success << ")"; out << std::endl << NOMAD::close_block ( oss.str() ) << std::endl; } }
/*-------------------------------------------------------------*/ void NOMAD::Speculative_Search::search ( NOMAD::Mads & mads , int & nb_search_pts , bool & stop , NOMAD::stop_type & stop_reason , NOMAD::success_type & success , bool & count_search , const NOMAD::Eval_Point *& new_feas_inc , const NOMAD::Eval_Point *& new_infeas_inc ) { // new_feas_inc and new_infeas_inc are used as inputs, // so do not initialize them to NULL here nb_search_pts = 0; success = NOMAD::UNSUCCESSFUL; count_search = !stop; if ( stop ) return; const NOMAD::Display & out = _p.out(); NOMAD::dd_type display_degree = out.get_search_dd(); if ( display_degree == NOMAD::FULL_DISPLAY ) { std::ostringstream oss; oss << NOMAD::SPEC_SEARCH; out << std::endl << NOMAD::open_block ( oss.str() ) << std::endl; } int lkm1; // l_{k-1} int lk; // l_k int n; NOMAD::Signature * signature; NOMAD::Point delta_m_k; NOMAD::Point delta_m_km1; NOMAD::Point factor; NOMAD::Point xkm1; NOMAD::Eval_Point * sk; const NOMAD::Eval_Point * x[2]; x[0] = new_feas_inc; x[1] = new_infeas_inc; // Evaluator_Control: NOMAD::Evaluator_Control & ev_control = mads.get_evaluator_control(); for ( int i = 0 ; i < 2 ; ++i ) { if ( x[i] && x[i]->get_mesh_index() ) { const NOMAD::Direction * dir = x[i]->get_direction(); if ( dir && ( dir->is_mads() || dir->get_type()==NOMAD::MODEL_SEARCH_DIR ) ) { // get the x_k's signature: signature = x[i]->get_signature(); if ( !signature ) throw NOMAD::Exception ( "Speculative_Search.cpp" , __LINE__ , "Speculative_Search::search(): could not get the signature" ); xkm1 = *x[i] - *dir; lk = lkm1 = *x[i]->get_mesh_index(); NOMAD::Mesh::update ( NOMAD::FULL_SUCCESS , lk ); n = signature->get_n(); delta_m_k = NOMAD::Point ( n ); delta_m_km1 = NOMAD::Point ( n ); factor = NOMAD::Point ( n ); signature->get_mesh().get_delta_m ( delta_m_k , lk ); signature->get_mesh().get_delta_m ( delta_m_km1 , lkm1 ); // multiplicative factor: takes into account the fact that // the direction contains \Delta^m_k: try { // factor = delta_m_k / delta_m_km1 : for ( int k = 0 ; k < n ; ++k ) { if ( delta_m_k[k].is_defined() && delta_m_km1[k].is_defined() && delta_m_k[k].value() != 0.0 && delta_m_km1[k].value() != 0.0 ) factor[k] = delta_m_k[k] / delta_m_km1[k]; else factor[k] = 0.0; } } catch ( NOMAD::Double::Invalid_Value & ) { if ( display_degree == NOMAD::FULL_DISPLAY ) out << "could not compute " << _type << " point: stop" << std::endl << NOMAD::close_block ( "end of speculative search" ); stop = true; stop_reason = NOMAD::MESH_PREC_REACHED; return; } if ( lkm1 <= 0 ) factor *= NOMAD::Mesh::get_mesh_update_basis(); // speculative search point: NOMAD::Direction new_dir ( n , 0.0 , dir->get_type() ); new_dir.Point::operator = ( factor * *dir ); sk = new NOMAD::Eval_Point; sk->set ( n , _p.get_bb_nb_outputs() ); sk->set_signature ( signature ); sk->set_direction ( &new_dir ); sk->set_mesh_index ( &lk ); sk->Point::operator = ( xkm1 + new_dir ); if ( display_degree == NOMAD::FULL_DISPLAY ) { out << "trial point #" << sk->get_tag() << ": ( "; sk->Point::display ( out ," " , 2 , NOMAD::Point::get_display_limit() ); out << " )" << std::endl; } // add the new point to the list of search trial points: ev_control.add_eval_point ( sk , display_degree , _p.get_snap_to_bounds() , NOMAD::Double() , NOMAD::Double() , NOMAD::Double() , NOMAD::Double() ); } } } nb_search_pts = ev_control.get_nb_eval_points(); // eval_list_of_points: // -------------------- new_feas_inc = new_infeas_inc = NULL; ev_control.eval_list_of_points ( _type , mads.get_true_barrier() , mads.get_sgte_barrier() , mads.get_pareto_front() , stop , stop_reason , new_feas_inc , new_infeas_inc , success ); if ( display_degree == NOMAD::FULL_DISPLAY ) { std::ostringstream oss; oss << "end of speculative search (" << success << ")"; out << NOMAD::close_block ( oss.str() ) << std::endl; } }