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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
19 class AbcDualRowDantzig : public AbcDualRowPivot {
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
58 AbcDualRowDantzig();
60
62 AbcDualRowDantzig(const AbcDualRowDantzig &);
63
65 AbcDualRowDantzig &operator=(const AbcDualRowDantzig &rhs);
66
68 virtual ~AbcDualRowDantzig();
69
71 virtual AbcDualRowPivot *clone(bool copyData = true) const;
72
74
75 //---------------------------------------------------------------------------
76
77 private:
80 CoinIndexedVector *infeasible_;
82 };
83
84 #endif
85
86 /* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
87 */
AbcDualRowDantzig::pivotRow
virtual int pivotRow()
Returns pivot row, -1 if none.
AbcDualRowDantzig::infeasible_
CoinIndexedVector * infeasible_
Definition: AbcDualRowDantzig.hpp:80
AbcDualRowDantzig::updateWeights
virtual double updateWeights(CoinIndexedVector &input, CoinIndexedVector &updatedColumn)
Updates weights and returns pivot alpha.
AbcSimplex
Definition: AbcSimplex.hpp:62
AbcDualRowDantzig::updatePrimalSolution
virtual void updatePrimalSolution(CoinIndexedVector &input, double theta)
Updates primal solution (and maybe list of candidates) Uses input vector which it deletes Computes ch...
AbcDualRowDantzig::AbcDualRowDantzig
AbcDualRowDantzig()
Default Constructor.
AbcDualRowDantzig::~AbcDualRowDantzig
virtual ~AbcDualRowDantzig()
Destructor.
AbcDualRowDantzig::updateWeightsOnly
virtual void updateWeightsOnly(CoinIndexedVector &)
Definition: AbcDualRowDantzig.hpp:32
AbcDualRowPivot
Dual Row Pivot Abstract Base Class.
Definition: AbcDualRowPivot.hpp:23
CoinIndexedVector
Indexed Vector.
Definition: CoinIndexedVector.hpp:104
AbcDualRowDantzig::updateWeights1
virtual double updateWeights1(CoinIndexedVector &input, CoinIndexedVector &updateColumn)
Does most of work for weights and returns pivot alpha.
AbcDualRowDantzig::clone
virtual AbcDualRowPivot * clone(bool copyData=true) const
Clone.
AbcDualRowDantzig::saveWeights
virtual void saveWeights(AbcSimplex *model, int mode)
Saves any weights round factorization as pivot rows may change Will be empty unless steepest edge (wi...
AbcDualRowDantzig
Dual Row Pivot Dantzig Algorithm Class.
Definition: AbcDualRowDantzig.hpp:19
AbcDualRowPivot::model
AbcSimplex * model()
Returns model.
Definition: AbcDualRowPivot.hpp:97
AbcDualRowDantzig::recomputeInfeasibilities
virtual void recomputeInfeasibilities()
Recompute infeasibilities.
AbcDualRowDantzig::updateWeights2
virtual void updateWeights2(CoinIndexedVector &input, CoinIndexedVector &)
Actually updates weights.
Definition: AbcDualRowDantzig.hpp:34
CoinIndexedVector::clear
void clear()
Reset the vector (as if were just created an empty vector). This leaves arrays!
AbcDualRowPivot.hpp
AbcDualRowDantzig::operator=
AbcDualRowDantzig & operator=(const AbcDualRowDantzig &rhs)
Assignment operator.