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AbcDualRowDantzig.hpp
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1 /* $Id: AbcDualRowDantzig.hpp 2385 2019-01-06 19:43:06Z unxusr $ */
2 // Copyright (C) 2002, International Business Machines
3 // Corporation and others, Copyright (C) 2012, FasterCoin. All Rights Reserved.
4 // This code is licensed under the terms of the Eclipse Public License (EPL).
5 
6 #ifndef AbcDualRowDantzig_H
7 #define AbcDualRowDantzig_H
8 
9 #include "AbcDualRowPivot.hpp"
10 
11 //#############################################################################
12 
20 
21 public:
23 
24 
26  virtual int pivotRow();
27 
30  virtual double updateWeights(CoinIndexedVector &input, CoinIndexedVector &updatedColumn);
31  virtual double updateWeights1(CoinIndexedVector &input, CoinIndexedVector &updateColumn);
32  virtual void updateWeightsOnly(CoinIndexedVector & /*input*/) {};
34  virtual void updateWeights2(CoinIndexedVector &input, CoinIndexedVector & /*updateColumn*/) { input.clear(); };
39  virtual void updatePrimalSolution(CoinIndexedVector &input,
40  double theta);
51  virtual void saveWeights(AbcSimplex *model, int mode);
53  virtual void recomputeInfeasibilities();
55 
57 
60 
63 
66 
68  virtual ~AbcDualRowDantzig();
69 
71  virtual AbcDualRowPivot *clone(bool copyData = true) const;
72 
74 
75  //---------------------------------------------------------------------------
76 
77 private:
82 };
83 
84 #endif
85 
86 /* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
87 */
virtual int pivotRow()
Returns pivot row, -1 if none.
CoinIndexedVector * infeasible_
virtual double updateWeights(CoinIndexedVector &input, CoinIndexedVector &updatedColumn)
Updates weights and returns pivot alpha.
virtual void updatePrimalSolution(CoinIndexedVector &input, double theta)
Updates primal solution (and maybe list of candidates) Uses input vector which it deletes Computes ch...
AbcDualRowDantzig()
Default Constructor.
virtual ~AbcDualRowDantzig()
Destructor.
virtual void updateWeightsOnly(CoinIndexedVector &)
Dual Row Pivot Abstract Base Class.
Indexed Vector.
virtual double updateWeights1(CoinIndexedVector &input, CoinIndexedVector &updateColumn)
Does most of work for weights and returns pivot alpha.
virtual AbcDualRowPivot * clone(bool copyData=true) const
Clone.
virtual void saveWeights(AbcSimplex *model, int mode)
Saves any weights round factorization as pivot rows may change Will be empty unless steepest edge (wi...
Dual Row Pivot Dantzig Algorithm Class.
AbcSimplex * model()
Returns model.
virtual void recomputeInfeasibilities()
Recompute infeasibilities.
virtual void updateWeights2(CoinIndexedVector &input, CoinIndexedVector &)
Actually updates weights.
void clear()
Reset the vector (as if were just created an empty vector). This leaves arrays!
AbcDualRowDantzig & operator=(const AbcDualRowDantzig &rhs)
Assignment operator.