// Copyright (C) 2003, International Business Machines
// Corporation and others. All Rights Reserved.
#ifndef ClpNetworkMatrix_H
#define ClpNetworkMatrix_H
#include "CoinPragma.hpp"
#include "ClpMatrixBase.hpp"
/** This implements a simple network matrix as derived from ClpMatrixBase.
If you want more sophisticated version then you could inherit from this.
Also you might want to allow networks with gain */
class ClpNetworkMatrix : 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 2*numberColumns_; }
/** 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
{ return indices_;}
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);
/// Append Columns
virtual void appendCols(int number, const CoinPackedVectorBase * const * columns);
/// Append Rows
virtual void appendRows(int number, const CoinPackedVectorBase * const * rows);
#ifndef SLIM_CLP
/** Append a set of rows/columns to the end of the matrix. Returns number of errors
i.e. if any of the new rows/columns contain an index that's larger than the
number of columns-1/rows-1 (if numberOther>0) or duplicates
If 0 then rows, 1 if columns */
virtual int appendMatrix(int number, int type,
const CoinBigIndex * starts, const int * index,
const double * element, int numberOther=-1);
#endif
/** 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(ClpSimplex * model,
const int * whichColumn,
int numberRowBasic,
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,
double * element);
/** Given positive integer weights for each row fills in sum of weights
for each column (and slack).
Returns weights vector
*/
virtual CoinBigIndex * dubiousWeights(const ClpSimplex * model,int * inputWeights) const;
/** Returns largest and smallest elements of both signs.
Largest refers to largest absolute value.
*/
virtual void rangeOfElements(double & smallestNegative, double & largestNegative,
double & smallestPositive, double & largestPositive);
/** 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 format
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
virtual void releasePackedMatrix() const ;
/// Says whether it can do partial pricing
virtual bool canDoPartialPricing() const;
/// Partial pricing
virtual void partialPricing(ClpSimplex * model, double start, double end,
int & bestSequence, int & numberWanted);
//@}
/**@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, double * spare=NULL) const;
/** 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
Squashes small elements and knows about ClpSimplex */
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 - z always packed mode */
virtual void subsetTransposeTimes(const ClpSimplex * model,
const CoinIndexedVector * x,
const CoinIndexedVector * y,
CoinIndexedVector * z) const;
//@}
/**@name Other */
//@{
/// Return true if really network, false if has slacks
inline bool trueNetwork() const
{ return trueNetwork_;}
//@}
/**@name Constructors, destructor */
//@{
/** Default constructor. */
ClpNetworkMatrix();
/** Constructor from two arrays */
ClpNetworkMatrix(int numberColumns, const int * head,
const int * tail);
/** Destructor */
virtual ~ClpNetworkMatrix();
//@}
/**@name Copy method */
//@{
/** The copy constructor. */
ClpNetworkMatrix(const ClpNetworkMatrix&);
/** The copy constructor from an CoinNetworkMatrix. */
ClpNetworkMatrix(const CoinPackedMatrix&);
ClpNetworkMatrix& operator=(const ClpNetworkMatrix&);
/// Clone
virtual ClpMatrixBase * clone() const ;
/** Subset constructor (without gaps). Duplicates are allowed
and order is as given */
ClpNetworkMatrix (const ClpNetworkMatrix & wholeModel,
int numberRows, const int * whichRows,
int numberColumns, const int * whichColumns);
/** Subset clone (without gaps). Duplicates are allowed
and order is as given */
virtual ClpMatrixBase * subsetClone (
int numberRows, const int * whichRows,
int numberColumns, const int * whichColumns) const ;
//@}
protected:
/**@name Data members
The data members are protected to allow access for derived classes. */
//@{
/// For fake CoinPackedMatrix
mutable CoinPackedMatrix * matrix_;
mutable int * lengths_;
/// Data -1, then +1 rows in pairs (row==-1 if one entry)
int * indices_;
/// Number of rows
int numberRows_;
/// Number of columns
int numberColumns_;
/// True if all entries have two elements
bool trueNetwork_;
//@}
};
#endif
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