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ClpPEPrimalColumnDantzig.hpp
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1 /*
2  Authors
3 
4  Jeremy Omer, Mehdi Towhidi
5 
6  Last update: april 10, 2015
7 
8  */
9 
10 #ifndef ClpPEPrimalColumnDantzig_H
11 #define ClpPEPrimalColumnDantzig_H
12 
14 #include "ClpPrimalColumnPivot.hpp"
15 #include "ClpSimplex.hpp"
16 #include "CoinIndexedVector.hpp"
17 #include "ClpFactorization.hpp"
18 #include "ClpNonLinearCost.hpp"
19 #include "ClpSimplexPrimal.hpp"
20 #include "ClpPackedMatrix.hpp"
21 #include "ClpPESimplex.hpp"
22 
24 
25 public:
27  ClpPEPrimalColumnDantzig(double psi = 0.5);
28  ClpPEPrimalColumnDantzig(const ClpPEPrimalColumnDantzig &); //copy constructor
29 
32 
35 
37  ClpPrimalColumnPivot *clone(bool copyData = true) const;
38 
39  virtual int pivotColumn(CoinIndexedVector *updates,
40  CoinIndexedVector *spareRow1,
41  CoinIndexedVector *spareRow2,
42  CoinIndexedVector *spareColumn1,
43  CoinIndexedVector *spareColumn2);
44 
46 
49  virtual void saveWeights(ClpSimplex *model, int mode);
50  //---------------------------------------------------------------------------
51 private:
52  /* this PESimplex object is used to identify the compatible variables */
54 
55  /* psi is the factor used in the bi-dimensional pricing, it is < 1 and
56  1/psi grows with the priority given to compatible variables */
57  double psi_;
58 
59  /* useful counters for the update of the set of compatible variables */
60  int iCurrent_;
62 
63  /* record if previous iterations concluded that compatibles should not be checked */
67 };
68 #endif
69 
70 /* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
71 */
Primal Column Pivot Abstract Base Class.
virtual int pivotColumn(CoinIndexedVector *updates, CoinIndexedVector *spareRow1, CoinIndexedVector *spareRow2, CoinIndexedVector *spareColumn1, CoinIndexedVector *spareColumn2)
Returns pivot column, -1 if none.
virtual void saveWeights(ClpSimplex *model, int mode)
Save weights - this may initialize weights as well This is as parent but may initialize ClpPESimplex...
ClpPEPrimalColumnDantzig(double psi=0.5)
constructors
Primal Column Pivot Dantzig Algorithm Class.
This solves LPs using the simplex method.
Definition: ClpSimplex.hpp:106
Indexed Vector.
ClpPEPrimalColumnDantzig & operator=(const ClpPEPrimalColumnDantzig &rhs)
assignment operator
ClpSimplex * model()
Returns model.
ClpPrimalColumnPivot * clone(bool copyData=true) const
clone
BASE CLASS FOR THE IMPROVED SIMPLEX.
~ClpPEPrimalColumnDantzig()
destructor