MoochoPack_LineSearchFullStepAfterKIter_Step.cpp

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

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