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# ClpPackedMatrix Class Reference

`#include <ClpPackedMatrix.hpp>`

Inheritance diagram for ClpPackedMatrix:

[legend]
Collaboration diagram for ClpPackedMatrix:

[legend]
List of all members.

## Public Member Functions
Useful methods
virtual CoinPackedMatrix * | getPackedMatrix () const
| Return a complete CoinPackedMatrix.
virtual bool | isColOrdered () const
| Whether the packed matrix is column major ordered or not.
virtual CoinBigIndex | getNumElements () const
| Number of entries in the packed matrix.
virtual int | getNumCols () const
| Number of columns.
virtual int | getNumRows () const
| Number of rows.
virtual const double * | getElements () const
| A vector containing the elements in the packed matrix.
double * | getMutableElements () const
| Mutable elements.
virtual const int * | getIndices () const
| A vector containing the minor indices of the elements in the packed matrix.
virtual const CoinBigIndex * | getVectorStarts () const
| Return a complete CoinPackedMatrix.
virtual const int * | getVectorLengths () const
| The lengths of the major-dimension vectors.
virtual int | getVectorLength (int index) const
| The length of a single major-dimension vector.
virtual void | deleteCols (const int numDel, const int *indDel)
| Delete the columns whose indices are listed in `indDel`.
virtual void | deleteRows (const int numDel, const int *indDel)
| Delete the rows whose indices are listed in `indDel`.
virtual void | appendCols (int number, const CoinPackedVectorBase *const *columns)
| Append Columns.
virtual void | appendRows (int number, const CoinPackedVectorBase *const *rows)
| Append Rows.
virtual int | appendMatrix (int number, int type, const CoinBigIndex *starts, const int *index, const double *element, int numberOther=-1)
| Append a set of rows/columns to the end of the matrix.
virtual void | replaceVector (const int index, const int numReplace, const double *newElements)
| Replace the elements of a vector.
virtual void | modifyCoefficient (int row, int column, double newElement, bool keepZero=false)
| Modify one element of packed matrix.
virtual ClpMatrixBase * | reverseOrderedCopy () const
| Returns a new matrix in reverse order without gaps.
virtual CoinBigIndex | countBasis (ClpSimplex *model, const int *whichColumn, int numberRowBasic, int &numberColumnBasic)
| Returns number of elements 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)
| Fills in column part of basis.
virtual int | scale (ClpModel *model, const ClpSimplex *baseModel=NULL) const
| Creates scales for column copy (rowCopy in model may be modified) returns non-zero if no scaling done.
virtual void | scaleRowCopy (ClpModel *model) const
| Scales rowCopy if column copy scaled Only called if scales already exist.
void | createScaledMatrix (ClpSimplex *model) const
| Creates scaled column copy if scales exist.
virtual ClpMatrixBase * | scaledColumnCopy (ClpModel *model) const
| Realy really scales column copy Only called if scales already exist.
virtual bool | allElementsInRange (ClpModel *model, double smallest, double largest, int check=15)
| Checks if all elements are in valid range.
virtual void | rangeOfElements (double &smallestNegative, double &largestNegative, double &smallestPositive, double &largestPositive)
| Returns largest and smallest elements of both signs.
virtual void | unpack (const ClpSimplex *model, CoinIndexedVector *rowArray, int column) const
| Unpacks a column into an CoinIndexedvector.
virtual void | unpackPacked (ClpSimplex *model, CoinIndexedVector *rowArray, int column) const
| Unpacks a column into an CoinIndexedvector in packed foramt Note that model is NOT const.
virtual void | add (const ClpSimplex *model, CoinIndexedVector *rowArray, int column, double multiplier) const
| Adds multiple of a column into an CoinIndexedvector You can use quickAdd to add to vector.
virtual void | add (const ClpSimplex *model, double *array, int column, double multiplier) const
| Adds multiple of a column into an array.
virtual void | releasePackedMatrix () const
| Allow any parts of a created CoinPackedMatrix to be deleted.
virtual CoinBigIndex * | dubiousWeights (const ClpSimplex *model, int *inputWeights) const
| Given positive integer weights for each row fills in sum of weights for each column (and slack).
virtual bool | canDoPartialPricing () const
| Says whether it can do partial pricing.
virtual void | partialPricing (ClpSimplex *model, double start, double end, int &bestSequence, int &numberWanted)
| Partial pricing.
virtual int | refresh (ClpSimplex *model)
| makes sure active columns correct
virtual void | reallyScale (const double *rowScale, const double *columnScale)
| Return a complete CoinPackedMatrix.
virtual void | setDimensions (int numrows, int numcols)
| Set the dimensions of the matrix.
Matrix times vector methods
virtual void | times (double scalar, const double *x, double *y) const
| Return `y + A * scalar *x` in `y`.
virtual void | times (double scalar, const double *x, double *y, const double *rowScale, const double *columnScale) const
| And for scaling.
virtual void | transposeTimes (double scalar, const double *x, double *y) const
| Return `y + x * scalar * A` in `y`.
virtual void | transposeTimes (double scalar, const double *x, double *y, const double *rowScale, const double *columnScale, double *spare=NULL) const
| And for scaling.
virtual void | transposeTimes (const ClpSimplex *model, double scalar, const CoinIndexedVector *x, CoinIndexedVector *y, CoinIndexedVector *z) const
| Return `x * scalar * A + y` in `z`.
void | transposeTimesByColumn (const ClpSimplex *model, double scalar, const CoinIndexedVector *x, CoinIndexedVector *y, CoinIndexedVector *z) const
| Return `x * scalar * A + y` in `z`.
virtual void | transposeTimesByRow (const ClpSimplex *model, double scalar, const CoinIndexedVector *x, CoinIndexedVector *y, CoinIndexedVector *z) const
| Return `x * scalar * A + y` in `z`.
virtual void | subsetTransposeTimes (const ClpSimplex *model, const CoinIndexedVector *x, const CoinIndexedVector *y, CoinIndexedVector *z) const
| Return `x *A` in `z` but just for indices in y.
virtual bool | canCombine (const ClpSimplex *model, const CoinIndexedVector *pi) const
| Returns true if can combine transposeTimes and subsetTransposeTimes and if it would be faster.
virtual void | transposeTimes2 (const ClpSimplex *model, const CoinIndexedVector *pi1, CoinIndexedVector *dj1, const CoinIndexedVector *pi2, CoinIndexedVector *dj2, CoinIndexedVector *spare, double referenceIn, double devex, unsigned int *reference, double *weights, double scaleFactor)
| Updates two arrays for steepest.
virtual void | subsetTimes2 (const ClpSimplex *model, CoinIndexedVector *dj1, const CoinIndexedVector *pi2, CoinIndexedVector *dj2, double referenceIn, double devex, unsigned int *reference, double *weights, double scaleFactor)
| Updates second array for steepest and does devex weights.
void | useEffectiveRhs (ClpSimplex *model)
| Sets up an effective RHS.
Other
CoinPackedMatrix * | matrix () const
| Returns CoinPackedMatrix (non const).
void | setMatrixNull ()
| Just sets matrix_ to NULL so it can be used elsewhere.
void | makeSpecialColumnCopy ()
| Say we want special column copy.
void | releaseSpecialColumnCopy ()
| Say we don't want special column copy.
bool | zeros () const
| Are there zeros?
bool | wantsSpecialColumnCopy () const
| Do we want special column copy.
Constructors, destructor
| ClpPackedMatrix ()
| Default constructor.
virtual | ~ClpPackedMatrix ()
| Destructor.
Copy method
| ClpPackedMatrix (const ClpPackedMatrix &)
| The copy constructor.
| ClpPackedMatrix (const CoinPackedMatrix &)
| The copy constructor from an CoinPackedMatrix.
| ClpPackedMatrix (const ClpPackedMatrix &wholeModel, int numberRows, const int *whichRows, int numberColumns, const int *whichColumns)
| Subset constructor (without gaps).
| ClpPackedMatrix (const CoinPackedMatrix &wholeModel, int numberRows, const int *whichRows, int numberColumns, const int *whichColumns)
| The copy constructor.
| ClpPackedMatrix (CoinPackedMatrix *matrix)
| This takes over ownership (for space reasons).
ClpPackedMatrix & | operator= (const ClpPackedMatrix &)
| The copy constructor.
virtual ClpMatrixBase * | clone () const
| Clone.
virtual void | copy (const ClpPackedMatrix *from)
| Copy contents - resizing if necessary - otherwise re-use memory.
virtual ClpMatrixBase * | subsetClone (int numberRows, const int *whichRows, int numberColumns, const int *whichColumns) const
| Subset clone (without gaps).
void | specialRowCopy (ClpSimplex *model, const ClpMatrixBase *rowCopy)
| make special row copy
void | specialColumnCopy (ClpSimplex *model)
| make special column copy
virtual void | correctSequence (const ClpSimplex *model, int &sequenceIn, int &sequenceOut)
| Correct sequence in and out to give true value.
## Protected Member Functions
void | checkFlags () const
| Check validity.
## Protected Attributes
Data members
The data members are protected to allow access for derived classes.
CoinPackedMatrix * | matrix_
| Data.
int | numberActiveColumns_
| number of active columns (normally same as number of columns)
int | flags_
| Flags - 1 - has zero elements 2 - has gaps 4 - has special row copy 8 - has special column copy.
ClpPackedMatrix2 * | rowCopy_
| Special row copy.
ClpPackedMatrix3 * | columnCopy_
| Special column copy.
## Private Member Functions
void | gutsOfTransposeTimesUnscaled (const double *pi, CoinIndexedVector *output, const double tolerance) const
| Meat of transposeTimes by column when not scaled.
void | gutsOfTransposeTimesScaled (const double *pi, const double *columnScale, CoinIndexedVector *output, const double tolerance) const
| Meat of transposeTimes by column when scaled.
void | gutsOfTransposeTimesByRowGE3 (const CoinIndexedVector *piVector, CoinIndexedVector *output, CoinIndexedVector *spareVector, const double tolerance, const double scalar) const
| Meat of transposeTimes by row n > 2 if packed.
void | gutsOfTransposeTimesByRowEQ2 (const CoinIndexedVector *piVector, CoinIndexedVector *output, CoinIndexedVector *spareVector, const double tolerance, const double scalar) const
| Meat of transposeTimes by row n == 2 if packed.
void | gutsOfTransposeTimesByRowEQ1 (const CoinIndexedVector *piVector, CoinIndexedVector *output, const double tolerance, const double scalar) const
| Meat of transposeTimes by row n == 1 if packed.
void | clearCopies ()
| Gets rid of special copies.

## Detailed Description

Definition at line 18 of file ClpPackedMatrix.hpp.

## Constructor & Destructor Documentation

ClpPackedMatrix::ClpPackedMatrix | ( |  | ) |

Default constructor.

virtual ClpPackedMatrix::~ClpPackedMatrix | ( |  | ) | `[virtual]`

Destructor.

ClpPackedMatrix::ClpPackedMatrix | ( | const ClpPackedMatrix & |  | ) |

The copy constructor.

ClpPackedMatrix::ClpPackedMatrix | ( | const CoinPackedMatrix & |  | ) |

The copy constructor from an CoinPackedMatrix.

ClpPackedMatrix::ClpPackedMatrix | ( | const ClpPackedMatrix & | wholeModel,
|  | int | numberRows,
|  | const int * | whichRows,
|  | int | numberColumns,
|  | const int * | whichColumns |
| ) |  |  |

Subset constructor (without gaps).

Duplicates are allowed and order is as given

ClpPackedMatrix::ClpPackedMatrix | ( | const CoinPackedMatrix & | wholeModel,
|  | int | numberRows,
|  | const int * | whichRows,
|  | int | numberColumns,
|  | const int * | whichColumns |
| ) |  |  |

The copy constructor.

ClpPackedMatrix::ClpPackedMatrix | ( | CoinPackedMatrix * | matrix | ) |

This takes over ownership (for space reasons).

## Member Function Documentation

virtual CoinPackedMatrix* ClpPackedMatrix::getPackedMatrix | ( |  | ) | const`[inline, virtual]`

Return a complete CoinPackedMatrix.

Implements ClpMatrixBase.

Definition at line 24 of file ClpPackedMatrix.hpp.

References matrix_.

virtual bool ClpPackedMatrix::isColOrdered | ( |  | ) | const`[inline, virtual]`

Whether the packed matrix is column major ordered or not.

Implements ClpMatrixBase.

Definition at line 26 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::isColOrdered(), and matrix_.

virtual CoinBigIndex ClpPackedMatrix::getNumElements | ( |  | ) | const`[inline, virtual]`

Number of entries in the packed matrix.

Implements ClpMatrixBase.

Definition at line 28 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getNumElements(), and matrix_.

virtual int ClpPackedMatrix::getNumCols | ( |  | ) | const`[inline, virtual]`

Number of columns.

Implements ClpMatrixBase.

Definition at line 31 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getNumCols(), and matrix_.

virtual int ClpPackedMatrix::getNumRows | ( |  | ) | const`[inline, virtual]`

Number of rows.

Implements ClpMatrixBase.

Definition at line 33 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getNumRows(), and matrix_.

virtual const double* ClpPackedMatrix::getElements | ( |  | ) | const`[inline, virtual]`

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.

Implements ClpMatrixBase.

Definition at line 39 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getElements(), and matrix_.

double* ClpPackedMatrix::getMutableElements | ( |  | ) | const`[inline]`

Mutable elements.

Definition at line 42 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getMutableElements(), and matrix_.

virtual const int* ClpPackedMatrix::getIndices | ( |  | ) | const`[inline, virtual]`

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.

Implements ClpMatrixBase.

Definition at line 49 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getIndices(), and matrix_.

virtual const CoinBigIndex* ClpPackedMatrix::getVectorStarts | ( |  | ) | const`[inline, virtual]`

Return a complete CoinPackedMatrix.

Implements ClpMatrixBase.

Definition at line 52 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getVectorStarts(), and matrix_.

virtual const int* ClpPackedMatrix::getVectorLengths | ( |  | ) | const`[inline, virtual]`

The lengths of the major-dimension vectors.

Implements ClpMatrixBase.

Definition at line 55 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getVectorLengths(), and matrix_.

virtual int ClpPackedMatrix::getVectorLength | ( | int | index | ) | const`[inline, virtual]`

The length of a single major-dimension vector.

Reimplemented from ClpMatrixBase.

Definition at line 58 of file ClpPackedMatrix.hpp.

References CoinPackedMatrix::getVectorSize(), and matrix_.

virtual void ClpPackedMatrix::deleteCols | ( | const int | numDel,
|  | const int * | indDel |
| ) |  |  | `[virtual]`

Delete the columns whose indices are listed in `indDel`.

Implements ClpMatrixBase.

virtual void ClpPackedMatrix::deleteRows | ( | const int | numDel,
|  | const int * | indDel |
| ) |  |  | `[virtual]`

Delete the rows whose indices are listed in `indDel`.

Implements ClpMatrixBase.

virtual void ClpPackedMatrix::appendCols | ( | int | number,
|  | const CoinPackedVectorBase *const * | columns |
| ) |  |  | `[virtual]`

Append Columns.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::appendRows | ( | int | number,
|  | const CoinPackedVectorBase *const * | rows |
| ) |  |  | `[virtual]`

Append Rows.

Reimplemented from ClpMatrixBase.

virtual int ClpPackedMatrix::appendMatrix | ( | int | number,
|  | int | type,
|  | const CoinBigIndex * | starts,
|  | const int * | index,
|  | const double * | element,
|  | int | numberOther = `-1` |
| ) |  |  | `[virtual]`

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

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::replaceVector | ( | const int | index,
|  | const int | numReplace,
|  | const double * | newElements |
| ) |  |  | `[inline, virtual]`

Replace the elements of a vector.

The indices remain the same. This is only needed if scaling and a row copy is used. At most the number specified will be replaced. The index is between 0 and major dimension of matrix

Definition at line 82 of file ClpPackedMatrix.hpp.

References matrix_, and CoinPackedMatrix::replaceVector().

virtual void ClpPackedMatrix::modifyCoefficient | ( | int | row,
|  | int | column,
|  | double | newElement,
|  | bool | keepZero = `false` |
| ) |  |  | `[inline, virtual]`

Modify one element of packed matrix.

An element may be added. This works for either ordering If the new element is zero it will be deleted unless keepZero true

Reimplemented from ClpMatrixBase.

Definition at line 88 of file ClpPackedMatrix.hpp.

References matrix_, and CoinPackedMatrix::modifyCoefficient().

virtual ClpMatrixBase* ClpPackedMatrix::reverseOrderedCopy | ( |  | ) | const`[virtual]`

Returns a new matrix in reverse order without gaps.

Reimplemented from ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual CoinBigIndex ClpPackedMatrix::countBasis | ( | ClpSimplex * | model,
|  | const int * | whichColumn,
|  | int | numberRowBasic,
|  | int & | numberColumnBasic |
| ) |  |  | `[virtual]`

Returns number of elements in column part of basis.

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual void ClpPackedMatrix::fillBasis | ( | ClpSimplex * | model,
|  | const int * | whichColumn,
|  | int & | numberColumnBasic,
|  | int * | row,
|  | int * | start,
|  | int * | rowCount,
|  | int * | columnCount,
|  | double * | element |
| ) |  |  | `[virtual]`

Fills in column part of basis.

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual int ClpPackedMatrix::scale | ( | ClpModel * | model,
|  | const ClpSimplex * | baseModel = `NULL` |
| ) |  |  | const`[virtual]`

Creates scales for column copy (rowCopy in model may be modified) returns non-zero if no scaling done.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::scaleRowCopy | ( | ClpModel * | model | ) | const`[virtual]`

Scales rowCopy if column copy scaled Only called if scales already exist.

Reimplemented from ClpMatrixBase.

void ClpPackedMatrix::createScaledMatrix | ( | ClpSimplex * | model | ) | const

Creates scaled column copy if scales exist.

virtual ClpMatrixBase* ClpPackedMatrix::scaledColumnCopy | ( | ClpModel * | model | ) | const`[virtual]`

Realy really scales column copy Only called if scales already exist.

Up to user ro delete

Reimplemented from ClpMatrixBase.

virtual bool ClpPackedMatrix::allElementsInRange | ( | ClpModel * | model,
|  | double | smallest,
|  | double | largest,
|  | int | check = `15` |
| ) |  |  | `[virtual]`

Checks if all elements are in valid range.

Can just return true if you are not paranoid. For Clp I will probably expect no zeros. Code can modify matrix to get rid of small elements. check bits (can be turned off to save time) : 1 - check if matrix has gaps 2 - check if zero elements 4 - check and compress duplicates 8 - report on large and small

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::rangeOfElements | ( | double & | smallestNegative,
|  | double & | largestNegative,
|  | double & | smallestPositive,
|  | double & | largestPositive |
| ) |  |  | `[virtual]`

Returns largest and smallest elements of both signs.

Largest refers to largest absolute value.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::unpack | ( | const ClpSimplex * | model,
|  | CoinIndexedVector * | rowArray,
|  | int | column |
| ) |  |  | const`[virtual]`

Unpacks a column into an CoinIndexedvector.

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual void ClpPackedMatrix::unpackPacked | ( | ClpSimplex * | model,
|  | CoinIndexedVector * | rowArray,
|  | int | column |
| ) |  |  | const`[virtual]`

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)

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual void ClpPackedMatrix::add | ( | const ClpSimplex * | model,
|  | CoinIndexedVector * | rowArray,
|  | int | column,
|  | double | multiplier |
| ) |  |  | const`[virtual]`

Adds multiple of a column into an CoinIndexedvector You can use quickAdd to add to vector.

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual void ClpPackedMatrix::add | ( | const ClpSimplex * | model,
|  | double * | array,
|  | int | column,
|  | double | multiplier |
| ) |  |  | const`[virtual]`

Adds multiple of a column into an array.

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual void ClpPackedMatrix::releasePackedMatrix | ( |  | ) | const`[inline, virtual]`

Allow any parts of a created CoinPackedMatrix to be deleted.

Implements ClpMatrixBase.

Definition at line 155 of file ClpPackedMatrix.hpp.

virtual CoinBigIndex* ClpPackedMatrix::dubiousWeights | ( | const ClpSimplex * | model,
|  | int * | inputWeights |
| ) |  |  | const`[virtual]`

Given positive integer weights for each row fills in sum of weights for each column (and slack).

Returns weights vector

Reimplemented from ClpMatrixBase.

virtual bool ClpPackedMatrix::canDoPartialPricing | ( |  | ) | const`[virtual]`

Says whether it can do partial pricing.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::partialPricing | ( | ClpSimplex * | model,
|  | double | start,
|  | double | end,
|  | int & | bestSequence,
|  | int & | numberWanted |
| ) |  |  | `[virtual]`

Partial pricing.

Reimplemented from ClpMatrixBase.

Reimplemented in ClpDynamicExampleMatrix, ClpDynamicMatrix, ClpGubDynamicMatrix, and ClpGubMatrix.

virtual int ClpPackedMatrix::refresh | ( | ClpSimplex * | model | ) | `[virtual]`

makes sure active columns correct

Reimplemented from ClpMatrixBase.

Reimplemented in ClpDynamicMatrix.

virtual void ClpPackedMatrix::reallyScale | ( | const double * | rowScale,
|  | const double * | columnScale |
| ) |  |  | `[virtual]`

Return a complete CoinPackedMatrix.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::setDimensions | ( | int | numrows,
|  | int | numcols |
| ) |  |  | `[virtual]`

Set the dimensions of the matrix.

In effect, append new empty columns/rows to the matrix. A negative number for either dimension means that that dimension doesn't change. Otherwise the new dimensions MUST be at least as large as the current ones otherwise an exception is thrown.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::times | ( | double | scalar,
|  | const double * | x,
|  | double * | y |
| ) |  |  | const`[virtual]`

Return `y + A * scalar *x` in `y`.

Precondition:
  `x` must be of size `numColumns()`

  `y` must be of size `numRows()`

Implements ClpMatrixBase.

Reimplemented in ClpDynamicMatrix, and ClpGubDynamicMatrix.

virtual void ClpPackedMatrix::times | ( | double | scalar,
|  | const double * | x,
|  | double * | y,
|  | const double * | rowScale,
|  | const double * | columnScale |
| ) |  |  | const`[virtual]`

And for scaling.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::transposeTimes | ( | double | scalar,
|  | const double * | x,
|  | double * | y |
| ) |  |  | const`[virtual]`

Return `y + x * scalar * A` in `y`.

Precondition:
  `x` must be of size `numRows()`

  `y` must be of size `numColumns()`

Implements ClpMatrixBase.

virtual void ClpPackedMatrix::transposeTimes | ( | double | scalar,
|  | const double * | x,
|  | double * | y,
|  | const double * | rowScale,
|  | const double * | columnScale,
|  | double * | spare = `NULL` |
| ) |  |  | const`[virtual]`

And for scaling.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::transposeTimes | ( | const ClpSimplex * | model,
|  | double | scalar,
|  | const CoinIndexedVector * | x,
|  | CoinIndexedVector * | y,
|  | CoinIndexedVector * | z |
| ) |  |  | const`[virtual]`

Return `x * scalar * A + y` in `z`.

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

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

void ClpPackedMatrix::transposeTimesByColumn | ( | const ClpSimplex * | model,
|  | double | scalar,
|  | const CoinIndexedVector * | x,
|  | CoinIndexedVector * | y,
|  | CoinIndexedVector * | z |
| ) |  |  | const

Return `x * scalar * A + y` in `z`.

Note - If x packed mode - then z packed mode This does by column and knows no gaps Squashes small elements and knows about ClpSimplex

virtual void ClpPackedMatrix::transposeTimesByRow | ( | const ClpSimplex * | model,
|  | double | scalar,
|  | const CoinIndexedVector * | x,
|  | CoinIndexedVector * | y,
|  | CoinIndexedVector * | z |
| ) |  |  | const`[virtual]`

Return `x * scalar * A + y` in `z`.

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. This version uses row copy

Reimplemented in ClpGubMatrix.

virtual void ClpPackedMatrix::subsetTransposeTimes | ( | const ClpSimplex * | model,
|  | const CoinIndexedVector * | x,
|  | const CoinIndexedVector * | y,
|  | CoinIndexedVector * | z |
| ) |  |  | const`[virtual]`

Return `x *A` in `z` but just for indices in y.

Note - z always packed mode

Implements ClpMatrixBase.

Reimplemented in ClpGubMatrix.

virtual bool ClpPackedMatrix::canCombine | ( | const ClpSimplex * | model,
|  | const CoinIndexedVector * | pi |
| ) |  |  | const`[virtual]`

Returns true if can combine transposeTimes and subsetTransposeTimes and if it would be faster.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::transposeTimes2 | ( | const ClpSimplex * | model,
|  | const CoinIndexedVector * | pi1,
|  | CoinIndexedVector * | dj1,
|  | const CoinIndexedVector * | pi2,
|  | CoinIndexedVector * | dj2,
|  | CoinIndexedVector * | spare,
|  | double | referenceIn,
|  | double | devex,
|  | unsigned int * | reference,
|  | double * | weights,
|  | double | scaleFactor |
| ) |  |  | `[virtual]`

Updates two arrays for steepest.

Reimplemented from ClpMatrixBase.

virtual void ClpPackedMatrix::subsetTimes2 | ( | const ClpSimplex * | model,
|  | CoinIndexedVector * | dj1,
|  | const CoinIndexedVector * | pi2,
|  | CoinIndexedVector * | dj2,
|  | double | referenceIn,
|  | double | devex,
|  | unsigned int * | reference,
|  | double * | weights,
|  | double | scaleFactor |
| ) |  |  | `[virtual]`

Updates second array for steepest and does devex weights.

Reimplemented from ClpMatrixBase.

void ClpPackedMatrix::useEffectiveRhs | ( | ClpSimplex * | model | ) |

Sets up an effective RHS.

Reimplemented from ClpMatrixBase.

CoinPackedMatrix* ClpPackedMatrix::matrix | ( |  | ) | const`[inline]`

Returns CoinPackedMatrix (non const).

Definition at line 261 of file ClpPackedMatrix.hpp.

References matrix_.

void ClpPackedMatrix::setMatrixNull | ( |  | ) | `[inline]`

Just sets matrix_ to NULL so it can be used elsewhere.

used in GUB

Definition at line 265 of file ClpPackedMatrix.hpp.

References matrix_.

void ClpPackedMatrix::makeSpecialColumnCopy | ( |  | ) | `[inline]`

Say we want special column copy.

Definition at line 268 of file ClpPackedMatrix.hpp.

References flags_.

void ClpPackedMatrix::releaseSpecialColumnCopy | ( |  | ) |

Say we don't want special column copy.

bool ClpPackedMatrix::zeros | ( |  | ) | const`[inline]`

Are there zeros?

Definition at line 273 of file ClpPackedMatrix.hpp.

References flags_.

bool ClpPackedMatrix::wantsSpecialColumnCopy | ( |  | ) | const`[inline]`

Do we want special column copy.

Definition at line 276 of file ClpPackedMatrix.hpp.

References flags_.

ClpPackedMatrix& ClpPackedMatrix::operator= | ( | const ClpPackedMatrix & |  | ) |

The copy constructor.

virtual ClpMatrixBase* ClpPackedMatrix::clone | ( |  | ) | const`[virtual]`

Clone.

Implements ClpMatrixBase.

Reimplemented in ClpDynamicExampleMatrix, ClpDynamicMatrix, ClpGubDynamicMatrix, and ClpGubMatrix.

virtual void ClpPackedMatrix::copy | ( | const ClpPackedMatrix * | from | ) | `[virtual]`

Copy contents - resizing if necessary - otherwise re-use memory.

virtual ClpMatrixBase* ClpPackedMatrix::subsetClone | ( | int | numberRows,
|  | const int * | whichRows,
|  | int | numberColumns,
|  | const int * | whichColumns |
| ) |  |  | const`[virtual]`

Subset clone (without gaps).

Duplicates are allowed and order is as given

Reimplemented from ClpMatrixBase.

Reimplemented in ClpGubMatrix.

void ClpPackedMatrix::specialRowCopy | ( | ClpSimplex * | model,
|  | const ClpMatrixBase * | rowCopy |
| ) |  |  |

make special row copy

void ClpPackedMatrix::specialColumnCopy | ( | ClpSimplex * | model | ) |

make special column copy

virtual void ClpPackedMatrix::correctSequence | ( | const ClpSimplex * | model,
|  | int & | sequenceIn,
|  | int & | sequenceOut |
| ) |  |  | `[virtual]`

Correct sequence in and out to give true value.

Reimplemented from ClpMatrixBase.

Reimplemented in ClpGubMatrix.

void ClpPackedMatrix::gutsOfTransposeTimesUnscaled | ( | const double * | pi,
|  | CoinIndexedVector * | output,
|  | const double | tolerance |
| ) |  |  | const`[private]`

Meat of transposeTimes by column when not scaled.

void ClpPackedMatrix::gutsOfTransposeTimesScaled | ( | const double * | pi,
|  | const double * | columnScale,
|  | CoinIndexedVector * | output,
|  | const double | tolerance |
| ) |  |  | const`[private]`

Meat of transposeTimes by column when scaled.

void ClpPackedMatrix::gutsOfTransposeTimesByRowGE3 | ( | const CoinIndexedVector * | piVector,
|  | CoinIndexedVector * | output,
|  | CoinIndexedVector * | spareVector,
|  | const double | tolerance,
|  | const double | scalar |
| ) |  |  | const`[private]`

Meat of transposeTimes by row n > 2 if packed.

void ClpPackedMatrix::gutsOfTransposeTimesByRowEQ2 | ( | const CoinIndexedVector * | piVector,
|  | CoinIndexedVector * | output,
|  | CoinIndexedVector * | spareVector,
|  | const double | tolerance,
|  | const double | scalar |
| ) |  |  | const`[private]`

Meat of transposeTimes by row n == 2 if packed.

void ClpPackedMatrix::gutsOfTransposeTimesByRowEQ1 | ( | const CoinIndexedVector * | piVector,
|  | CoinIndexedVector * | output,
|  | const double | tolerance,
|  | const double | scalar |
| ) |  |  | const`[private]`

Meat of transposeTimes by row n == 1 if packed.

void ClpPackedMatrix::clearCopies | ( |  | ) | `[private]`

Gets rid of special copies.

void ClpPackedMatrix::checkFlags | ( |  | ) | const`[protected]`

Check validity.

## Member Data Documentation

CoinPackedMatrix* ClpPackedMatrix::matrix_`[protected]`

Data.

Definition at line 349 of file ClpPackedMatrix.hpp.

Referenced by getElements(), getIndices(), getMutableElements(), getNumCols(), getNumElements(), getNumRows(), getPackedMatrix(), getVectorLength(), getVectorLengths(), getVectorStarts(), isColOrdered(), matrix(), modifyCoefficient(), replaceVector(), and setMatrixNull().

int ClpPackedMatrix::numberActiveColumns_`[protected]`

number of active columns (normally same as number of columns)

Definition at line 351 of file ClpPackedMatrix.hpp.

int ClpPackedMatrix::flags_`[protected]`

Flags - 1 - has zero elements 2 - has gaps 4 - has special row copy 8 - has special column copy.

Definition at line 358 of file ClpPackedMatrix.hpp.

Referenced by makeSpecialColumnCopy(), wantsSpecialColumnCopy(), and zeros().

ClpPackedMatrix2* ClpPackedMatrix::rowCopy_`[protected]`

Special row copy.

Definition at line 360 of file ClpPackedMatrix.hpp.

ClpPackedMatrix3* ClpPackedMatrix::columnCopy_`[protected]`

Special column copy.

Definition at line 362 of file ClpPackedMatrix.hpp.

The documentation for this class was generated from the following file:

- /home/coin/SVN-release/Osi-0.98.1/Clp/src/ClpPackedMatrix.hpp