MoochoPack_LineSearchFullStepAfterKIter_Step.cpp

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00001 #if 0
00002 
00003 // @HEADER
00004 // ***********************************************************************
00005 // 
00006 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
00007 //                  Copyright (2003) Sandia Corporation
00008 // 
00009 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00010 // license for use of this work by or on behalf of the U.S. Government.
00011 // 
00012 // This library is free software; you can redistribute it and/or modify
00013 // it under the terms of the GNU Lesser General Public License as
00014 // published by the Free Software Foundation; either version 2.1 of the
00015 // License, or (at your option) any later version.
00016 //  
00017 // This library is distributed in the hope that it will be useful, but
00018 // WITHOUT ANY WARRANTY; without even the implied warranty of
00019 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00020 // Lesser General Public License for more details.
00021 //  
00022 // You should have received a copy of the GNU Lesser General Public
00023 // License along with this library; if not, write to the Free Software
00024 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00025 // USA
00026 // Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
00027 // 
00028 // ***********************************************************************
00029 // @HEADER
00030 
00031 #include <ostream>
00032 
00033 #include "MoochoPack_LineSearchFullStepAfterKIter_Step.hpp"
00034 #include "MoochoPack_moocho_algo_conversion.hpp"
00035 #include "IterationPack_print_algorithm_step.hpp"
00036 
00037 bool MoochoPack::LineSearchFullStepAfterKIter_Step::do_step(Algorithm& _algo
00038   , poss_type step_poss, IterationPack::EDoStepType type, poss_type assoc_step_poss)
00039 {
00040   NLPAlgo &algo = rsqp_algo(_algo);
00041   NLPAlgoState  &s    = algo.rsqp_state();
00042   NLP     &nlp  = algo.nlp();
00043 
00044   EJournalOutputLevel olevel = algo.algo_cntr().journal_output_level();
00045   std::ostream& out = algo.track().journal_out();
00046   out << std::boolalpha;
00047 
00048   // print step header.
00049   if( (int)olevel >= (int)PRINT_ALGORITHM_STEPS ) {
00050     using IterationPack::print_algorithm_step;
00051     print_algorithm_step( algo, step_poss, type, assoc_step_poss, out );
00052   }
00053 
00054   const bool take_full_step = s.k() > full_steps_after_k();
00055 
00056   if( (int)olevel >= (int)PRINT_ALGORITHM_STEPS ) {
00057       out << "\nk = " << s.k() << ( take_full_step ? " > " : " < ")
00058           << "full_steps_after_k = " << full_steps_after_k() << std::endl;
00059   }
00060 
00061   if( !take_full_step ) {
00062     return line_search().do_step(_algo,step_poss,type,assoc_step_poss);
00063   }
00064   else {
00065     if( (int)olevel >= (int)PRINT_ALGORITHM_STEPS ) {
00066       out << "\nKeep the full step...\n";
00067     }
00068   }
00069 
00070   return true;
00071 }
00072 
00073 void MoochoPack::LineSearchFullStepAfterKIter_Step::print_step( const Algorithm& algo
00074   , poss_type step_poss, IterationPack::EDoStepType type, poss_type assoc_step_poss
00075   , std::ostream& out, const std::string& L ) const
00076 {
00077   out << L << "*** Start using full steps after full_steps_after_k iterations.\n"
00078     << L << "default: full_steps_after_k = very big\n";
00079   out << L << "if k < full_steps_after_k then\n";
00080   line_search().print_step(algo,step_poss,type,assoc_step_poss,out,L + "    " );
00081   out << L << "end\n";
00082 }
00083 
00084 #endif // 0

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