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authorHarpreet2016-09-03 00:36:51 +0530
committerHarpreet2016-09-03 00:36:51 +0530
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-/* $Id: ClpQuadraticObjective.hpp 1665 2011-01-04 17:55:54Z lou $ */
-// Copyright (C) 2003, International Business Machines
-// Corporation and others. All Rights Reserved.
-// This code is licensed under the terms of the Eclipse Public License (EPL).
-
-#ifndef ClpQuadraticObjective_H
-#define ClpQuadraticObjective_H
-
-#include "ClpObjective.hpp"
-#include "CoinPackedMatrix.hpp"
-
-//#############################################################################
-
-/** Quadratic Objective Class
-
-*/
-
-class ClpQuadraticObjective : public ClpObjective {
-
-public:
-
- ///@name Stuff
- //@{
-
- /** Returns gradient. If Quadratic then solution may be NULL,
- also returns an offset (to be added to current one)
- If refresh is false then uses last solution
- Uses model for scaling
- includeLinear 0 - no, 1 as is, 2 as feasible
- */
- virtual double * gradient(const ClpSimplex * model,
- const double * solution, double & offset, bool refresh,
- int includeLinear = 2);
- /// Resize objective
- /** Returns reduced gradient.Returns an offset (to be added to current one).
- */
- virtual double reducedGradient(ClpSimplex * model, double * region,
- bool useFeasibleCosts);
- /** Returns step length which gives minimum of objective for
- solution + theta * change vector up to maximum theta.
-
- arrays are numberColumns+numberRows
- Also sets current objective, predicted and at maximumTheta
- */
- virtual double stepLength(ClpSimplex * model,
- const double * solution,
- const double * change,
- double maximumTheta,
- double & currentObj,
- double & predictedObj,
- double & thetaObj);
- /// Return objective value (without any ClpModel offset) (model may be NULL)
- virtual double objectiveValue(const ClpSimplex * model, const double * solution) const ;
- virtual void resize(int newNumberColumns) ;
- /// Delete columns in objective
- virtual void deleteSome(int numberToDelete, const int * which) ;
- /// Scale objective
- virtual void reallyScale(const double * columnScale) ;
- /** Given a zeroed array sets nonlinear columns to 1.
- Returns number of nonlinear columns
- */
- virtual int markNonlinear(char * which);
-
- //@}
-
-
- ///@name Constructors and destructors
- //@{
- /// Default Constructor
- ClpQuadraticObjective();
-
- /// Constructor from objective
- ClpQuadraticObjective(const double * linearObjective, int numberColumns,
- const CoinBigIndex * start,
- const int * column, const double * element,
- int numberExtendedColumns_ = -1);
-
- /** Copy constructor .
- If type is -1 then make sure half symmetric,
- if +1 then make sure full
- */
- ClpQuadraticObjective(const ClpQuadraticObjective & rhs, int type = 0);
- /** Subset constructor. Duplicates are allowed
- and order is as given.
- */
- ClpQuadraticObjective (const ClpQuadraticObjective &rhs, int numberColumns,
- const int * whichColumns) ;
-
- /// Assignment operator
- ClpQuadraticObjective & operator=(const ClpQuadraticObjective& rhs);
-
- /// Destructor
- virtual ~ClpQuadraticObjective ();
-
- /// Clone
- virtual ClpObjective * clone() const;
- /** Subset clone. Duplicates are allowed
- and order is as given.
- */
- virtual ClpObjective * subsetClone (int numberColumns,
- const int * whichColumns) const;
-
- /** Load up quadratic objective. This is stored as a CoinPackedMatrix */
- void loadQuadraticObjective(const int numberColumns,
- const CoinBigIndex * start,
- const int * column, const double * element,
- int numberExtendedColumns = -1);
- void loadQuadraticObjective ( const CoinPackedMatrix& matrix);
- /// Get rid of quadratic objective
- void deleteQuadraticObjective();
- //@}
- ///@name Gets and sets
- //@{
- /// Quadratic objective
- inline CoinPackedMatrix * quadraticObjective() const {
- return quadraticObjective_;
- }
- /// Linear objective
- inline double * linearObjective() const {
- return objective_;
- }
- /// Length of linear objective which could be bigger
- inline int numberExtendedColumns() const {
- return numberExtendedColumns_;
- }
- /// Number of columns in quadratic objective
- inline int numberColumns() const {
- return numberColumns_;
- }
- /// If a full or half matrix
- inline bool fullMatrix() const {
- return fullMatrix_;
- }
- //@}
-
- //---------------------------------------------------------------------------
-
-private:
- ///@name Private member data
- /// Quadratic objective
- CoinPackedMatrix * quadraticObjective_;
- /// Objective
- double * objective_;
- /// Gradient
- double * gradient_;
- /// Useful to have number of columns about
- int numberColumns_;
- /// Also length of linear objective which could be bigger
- int numberExtendedColumns_;
- /// True if full symmetric matrix, false if half
- bool fullMatrix_;
- //@}
-};
-
-#endif