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# /home/coin/SVN-release/Bcps-0.91.0/Cgl/src/CglRedSplit/CglRedSplit.hpp

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    00001 // Last edit: 4/20/07
    00002 //
    00003 // Name:     CglRedSplit.hpp
    00004 // Author:   Francois Margot
    00005 //           Tepper School of Business
    00006 //           Carnegie Mellon University, Pittsburgh, PA 15213
    00007 //           email: fmargot@andrew.cmu.edu
    00008 // Date:     2/6/05
    00009 //-----------------------------------------------------------------------------
    00010 // Copyright (C) 2005, Francois Margot and others.  All Rights Reserved.
    00011
    00012 #ifndef CglRedSplit_H
    00013 #define CglRedSplit_H
    00014
    00015 #include "CglCutGenerator.hpp"
    00016 #include "CglRedSplitParam.hpp"
    00017
    00023 class CglRedSplit : public CglCutGenerator {
    00024
    00025   friend void CglRedSplitUnitTest(const OsiSolverInterface * siP,
    00026                                   const std::string mpdDir);
    00027 public:
    00058   virtual void generateCuts(const OsiSolverInterface & si, OsiCuts & cs,
    00059                             const CglTreeInfo info = CglTreeInfo());
    00060
    00062   virtual void generateCuts(const OsiSolverInterface & si, OsiCuts & cs,
    00063                             const CglTreeInfo info = CglTreeInfo()) const;
    00064
    00066   virtual bool needsOptimalBasis() const;
    00068
    00069
    00072
    00073   // Set the parameters to the values of the given CglRedSplitParam object.
    00074   void setParam(const CglRedSplitParam &source);
    00075   // Return the CglRedSplitParam object of the generator.
    00076   inline CglRedSplitParam getParam() const {return param;}
    00077
    00078   // Compute entries of low_is_lub and up_is_lub.
    00079   void compute_is_lub();
    00080
    00081   // Compute entries of is_integer.
    00082   void compute_is_integer();
    00083
    00089   void set_given_optsol(const double *given_sol, const int card_sol);
    00090
    00092   void print() const;
    00093
    00095   void printOptTab(OsiSolverInterface *solver) const;
    00096
    00098
    00101   //************************************************************
    00102   // TO BE REMOVED
    00105   void setLimit(int limit);
    00107   int getLimit() const;
    00108
    00113   void setAway(double value);
    00115   double getAway() const;
    00119   void setLUB(double value);
    00121   double getLUB() const;
    00122
    00125   void setEPS(double value);
    00127   double getEPS() const;
    00128
    00131   void setEPS_COEFF(double value);
    00133   double getEPS_COEFF() const;
    00134
    00138   void setEPS_COEFF_LUB(double value);
    00140   double getEPS_COEFF_LUB() const;
    00141
    00145   void setEPS_RELAX(double value);
    00147   double getEPS_RELAX() const;
    00148
    00151   void setNormIsZero(double value);
    00153   double getNormIsZero() const;
    00154
    00157   void setMinReduc(double value);
    00159   double getMinReduc() const;
    00160
    00166   void setMaxTab(double value);
    00168   double getMaxTab() const;
    00169   // END TO BE REMOVED
    00170   //************************************************************
    00171
    00173
    00176
    00177   CglRedSplit();
    00178
    00180   CglRedSplit(const CglRedSplitParam &RS_param);
    00181
    00183   CglRedSplit (const CglRedSplit &);
    00184
    00186   virtual CglCutGenerator * clone() const;
    00187
    00189   CglRedSplit &
    00190     operator=(
    00191     const CglRedSplit& rhs);
    00192
    00194   virtual
    00195     ~CglRedSplit ();
    00197   virtual std::string generateCpp( FILE * fp);
    00199
    00200 private:
    00201
    00202   // Private member methods
    00203
    00207
    00208   // Method generating the cuts after all CglRedSplit members are properly set.
    00209   void generateCuts(OsiCuts & cs);
    00210
    00212   inline double rs_above_integer(double value);
    00213
    00215   void update_pi_mat(int r1, int r2, int step);
    00216
    00218   void update_redTab(int r1, int r2, int step);
    00219
    00222   void find_step(int r1, int r2, int *step,
    00223                  double *reduc, double *norm);
    00224
    00227   int test_pair(int r1, int r2, double *norm);
    00228
    00230   void reduce_contNonBasicTab();
    00231
    00233   void generate_row(int index_row, double *row);
    00234
    00237   int generate_cgcut(double *row, double *rhs);
    00238
    00241   int generate_cgcut_2(int basic_ind, double *row, double *rhs);
    00242
    00245   void eliminate_slacks(double *row,
    00246                         const double *elements,
    00247                         const int *start,
    00248                         const int *indices,
    00249                         const int *rowLength,
    00250                         const double *rhs, double *rowrhs);
    00251
    00254   void flip(double *row);
    00255
    00260   void unflip(double *row, double *rowrhs, double *slack_val);
    00261
    00269   double row_scale_factor(double *row);
    00270
    00272   int generate_packed_row(const double *xlp, double *row,
    00273                           int *rowind, double *rowelem,
    00274                           int *card_row, double & rhs);
    00275
    00277   void check_optsol(const int calling_place,
    00278                     const double *xlp, const double *slack_val,
    00279                     const int do_flip);
    00280
    00282   void check_optsol(const int calling_place,
    00283                     const double *xlp, const double *slack_val,
    00284                     const double *ck_row, const double ck_rhs,
    00285                     const int cut_number, const int do_flip);
    00286
    00287   // Check that two vectors are different.
    00288   bool rs_are_different_vectors(const int *vect1,
    00289                                 const int *vect2,
    00290                                 const int dim);
    00291
    00292   // Check that two vectors are different.
    00293   bool rs_are_different_vectors(const double *vect1,
    00294                                 const double *vect2,
    00295                                 const int dim);
    00296
    00297   // Check that two matrices are different.
    00298   bool rs_are_different_matrices(const CoinPackedMatrix *mat1,
    00299                                  const CoinPackedMatrix *mat2,
    00300                                  const int nmaj,
    00301                                  const int nmin);
    00303
    00304
    00305   // Private member data
    00306
    00310
    00312   CglRedSplitParam param;
    00313
    00315   int nrow;
    00316
    00318   int ncol;
    00319
    00321   const double *colLower;
    00322
    00324   const double *colUpper;
    00325
    00327   const double *rowLower;
    00328
    00330   const double *rowUpper;
    00331
    00333   const double *rowRhs;
    00334
    00337   int card_intBasicVar_frac;
    00338
    00341   int card_intNonBasicVar;
    00342
    00345   int card_contNonBasicVar;
    00346
    00349   int card_nonBasicAtUpper;
    00350
    00353   int card_nonBasicAtLower;
    00354
    00357   int *cv_intBasicVar_frac;
    00358
    00361   int *intBasicVar_frac;
    00362
    00364   int *intNonBasicVar;
    00365
    00367   // slacks are considered continuous (no harm if this is not the case).
    00368   int *contNonBasicVar;
    00369
    00372   int *nonBasicAtUpper;
    00373
    00376   int *nonBasicAtLower;
    00377
    00379   int mTab;
    00380
    00382   int nTab;
    00383
    00386   int **pi_mat;
    00387
    00391   double **contNonBasicTab;
    00392
    00395   // Dimensions: mTab by card_intNonBasicVar.
    00396   double **intNonBasicTab;
    00397
    00400   double *rhsTab ;
    00401
    00403   const double *given_optsol;
    00404
    00406   int card_given_optsol;
    00407
    00410   int *is_integer;
    00411
    00414   int *low_is_lub;
    00415
    00418   int *up_is_lub;
    00419
    00421   OsiSolverInterface *solver;
    00422
    00424   const double *xlp;
    00425
    00427   const double *rowActivity;
    00428
    00430   const char *colType;
    00431
    00434   const CoinPackedMatrix *byRow;
    00435
    00437 };
    00438
    00439 //#############################################################################
    00445 void CglRedSplitUnitTest(const OsiSolverInterface * siP,
    00446                          const std::string mpdDir );
    00447
    00448
    00449 #endif