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/* $Id: ClpDummyMatrix.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 ClpDummyMatrix_H
#define ClpDummyMatrix_H
#include "CoinPragma.hpp"
#include "ClpMatrixBase.hpp"
/** This implements a dummy matrix as derived from ClpMatrixBase.
This is so you can do ClpPdco but may come in useful elsewhere.
It just has dimensions but no data
*/
class ClpDummyMatrix : public ClpMatrixBase {
public:
/**@name Useful methods */
//@{
/// Return a complete CoinPackedMatrix
virtual CoinPackedMatrix * getPackedMatrix() const;
/** Whether the packed matrix is column major ordered or not. */
virtual bool isColOrdered() const {
return true;
}
/** Number of entries in the packed matrix. */
virtual CoinBigIndex getNumElements() const {
return numberElements_;
}
/** Number of columns. */
virtual int getNumCols() const {
return numberColumns_;
}
/** Number of rows. */
virtual int getNumRows() const {
return numberRows_;
}
/** A vector containing the elements in the packed matrix. Note that there
might be gaps in this list, entries that do not belong to any
major-dimension vector. To get the actual elements one should look at
this vector together with vectorStarts and vectorLengths. */
virtual const double * getElements() const;
/** A vector containing the minor indices of the elements in the packed
matrix. Note that there might be gaps in this list, entries that do not
belong to any major-dimension vector. To get the actual elements one
should look at this vector together with vectorStarts and
vectorLengths. */
virtual const int * getIndices() const;
virtual const CoinBigIndex * getVectorStarts() const;
/** The lengths of the major-dimension vectors. */
virtual const int * getVectorLengths() const;
/** Delete the columns whose indices are listed in <code>indDel</code>. */
virtual void deleteCols(const int numDel, const int * indDel);
/** Delete the rows whose indices are listed in <code>indDel</code>. */
virtual void deleteRows(const int numDel, const int * indDel);
/** Returns a new matrix in reverse order without gaps */
virtual ClpMatrixBase * reverseOrderedCopy() const;
/// Returns number of elements in column part of basis
virtual CoinBigIndex countBasis(const int * whichColumn,
int & numberColumnBasic);
/// Fills in column part of basis
virtual void fillBasis(ClpSimplex * model,
const int * whichColumn,
int & numberColumnBasic,
int * row, int * start,
int * rowCount, int * columnCount,
CoinFactorizationDouble * element);
/** Unpacks a column into an CoinIndexedvector
*/
virtual void unpack(const ClpSimplex * model, CoinIndexedVector * rowArray,
int column) const ;
/** Unpacks a column into an CoinIndexedvector
** in packed foramt
Note that model is NOT const. Bounds and objective could
be modified if doing column generation (just for this variable) */
virtual void unpackPacked(ClpSimplex * model,
CoinIndexedVector * rowArray,
int column) const;
/** Adds multiple of a column into an CoinIndexedvector
You can use quickAdd to add to vector */
virtual void add(const ClpSimplex * model, CoinIndexedVector * rowArray,
int column, double multiplier) const ;
/** Adds multiple of a column into an array */
virtual void add(const ClpSimplex * model, double * array,
int column, double multiplier) const;
/// Allow any parts of a created CoinMatrix to be deleted
/// Allow any parts of a created CoinPackedMatrix to be deleted
virtual void releasePackedMatrix() const {}
//@}
/**@name Matrix times vector methods */
//@{
/** Return <code>y + A * scalar *x</code> in <code>y</code>.
@pre <code>x</code> must be of size <code>numColumns()</code>
@pre <code>y</code> must be of size <code>numRows()</code> */
virtual void times(double scalar,
const double * x, double * y) const;
/// And for scaling
virtual void times(double scalar,
const double * x, double * y,
const double * rowScale,
const double * columnScale) const;
/** Return <code>y + x * scalar * A</code> in <code>y</code>.
@pre <code>x</code> must be of size <code>numRows()</code>
@pre <code>y</code> must be of size <code>numColumns()</code> */
virtual void transposeTimes(double scalar,
const double * x, double * y) const;
/// And for scaling
virtual void transposeTimes(double scalar,
const double * x, double * y,
const double * rowScale,
const double * columnScale) const;
using ClpMatrixBase::transposeTimes ;
/** Return <code>x * scalar * A + y</code> in <code>z</code>.
Can use y as temporary array (will be empty at end)
Note - If x packed mode - then z packed mode */
virtual void transposeTimes(const ClpSimplex * model, double scalar,
const CoinIndexedVector * x,
CoinIndexedVector * y,
CoinIndexedVector * z) const;
/** Return <code>x *A</code> in <code>z</code> but
just for indices in y.
Note - If x packed mode - then z packed mode
Squashes small elements and knows about ClpSimplex */
virtual void subsetTransposeTimes(const ClpSimplex * model,
const CoinIndexedVector * x,
const CoinIndexedVector * y,
CoinIndexedVector * z) const;
//@}
/**@name Other */
//@{
//@}
/**@name Constructors, destructor */
//@{
/** Default constructor. */
ClpDummyMatrix();
/// Constructor with data
ClpDummyMatrix(int numberColumns, int numberRows,
int numberElements);
/** Destructor */
virtual ~ClpDummyMatrix();
//@}
/**@name Copy method */
//@{
/** The copy constructor. */
ClpDummyMatrix(const ClpDummyMatrix&);
/** The copy constructor from an CoinDummyMatrix. */
ClpDummyMatrix(const CoinPackedMatrix&);
ClpDummyMatrix& operator=(const ClpDummyMatrix&);
/// Clone
virtual ClpMatrixBase * clone() const ;
//@}
protected:
/**@name Data members
The data members are protected to allow access for derived classes. */
//@{
/// Number of rows
int numberRows_;
/// Number of columns
int numberColumns_;
/// Number of elements
int numberElements_;
//@}
};
#endif
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