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CoinDenseFactorization Class Reference

This deals with Factorization and Updates This is a simple dense version so other people can write a better one. More...

#include <CoinDenseFactorization.hpp>

+ Inheritance diagram for CoinDenseFactorization:
+ Collaboration diagram for CoinDenseFactorization:

Public Member Functions

void gutsOfDestructor ()
 The real work of desstructor. More...
 
void gutsOfInitialize ()
 The real work of constructor. More...
 
void gutsOfCopy (const CoinDenseFactorization &other)
 The real work of copy. More...
 
Constructors and destructor and copy
 CoinDenseFactorization ()
 Default constructor. More...
 
 CoinDenseFactorization (const CoinDenseFactorization &other)
 Copy constructor. More...
 
virtual ~CoinDenseFactorization ()
 Destructor. More...
 
CoinDenseFactorizationoperator= (const CoinDenseFactorization &other)
 = copy More...
 
virtual CoinOtherFactorizationclone () const
 Clone. More...
 
Do factorization - public
virtual void getAreas (int numberRows, int numberColumns, CoinBigIndex maximumL, CoinBigIndex maximumU)
 Gets space for a factorization. More...
 
virtual void preProcess ()
 PreProcesses column ordered copy of basis. More...
 
virtual int factor ()
 Does most of factorization returning status 0 - OK -99 - needs more memory -1 - singular - use numberGoodColumns and redo. More...
 
virtual void postProcess (const int *sequence, int *pivotVariable)
 Does post processing on valid factorization - putting variables on correct rows. More...
 
virtual void makeNonSingular (int *sequence, int numberColumns)
 Makes a non-singular basis by replacing variables. More...
 
general stuff such as number of elements
virtual int numberElements () const
 Total number of elements in factorization. More...
 
double maximumCoefficient () const
 Returns maximum absolute value in factorization. More...
 
rank one updates which do exist
virtual int replaceColumn (CoinIndexedVector *regionSparse, int pivotRow, double pivotCheck, bool checkBeforeModifying=false, double acceptablePivot=1.0e-8)
 Replaces one Column to basis, returns 0=OK, 1=Probably OK, 2=singular, 3=no room If checkBeforeModifying is true will do all accuracy checks before modifying factorization. More...
 
various uses of factorization (return code number elements)

which user may want to know about

virtual int updateColumnFT (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2, bool=false)
 Updates one column (FTRAN) from regionSparse2 Tries to do FT update number returned is negative if no room regionSparse starts as zero and is zero at end. More...
 
virtual int updateColumn (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2, bool noPermute=false) const
 This version has same effect as above with FTUpdate==false so number returned is always >=0. More...
 
virtual int updateTwoColumnsFT (CoinIndexedVector *regionSparse1, CoinIndexedVector *regionSparse2, CoinIndexedVector *regionSparse3, bool noPermute=false)
 does FTRAN on two columns More...
 
virtual int updateColumnTranspose (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2) const
 Updates one column (BTRAN) from regionSparse2 regionSparse starts as zero and is zero at end Note - if regionSparse2 packed on input - will be packed on output. More...
 
various uses of factorization

*** Below this user may not want to know about

which user may not want to know about (left over from my LP code)

void clearArrays ()
 Get rid of all memory. More...
 
virtual int * indices () const
 Returns array to put basis indices in. More...
 
virtual int * permute () const
 Returns permute in. More...
 
- Public Member Functions inherited from CoinOtherFactorization
 CoinOtherFactorization ()
 Default constructor. More...
 
 CoinOtherFactorization (const CoinOtherFactorization &other)
 Copy constructor. More...
 
virtual ~CoinOtherFactorization ()
 Destructor. More...
 
CoinOtherFactorizationoperator= (const CoinOtherFactorization &other)
 = copy More...
 
int status () const
 Returns status. More...
 
void setStatus (int value)
 Sets status. More...
 
int pivots () const
 Returns number of pivots since factorization. More...
 
void setPivots (int value)
 Sets number of pivots since factorization. More...
 
void setNumberRows (int value)
 Set number of Rows after factorization. More...
 
int numberRows () const
 Number of Rows after factorization. More...
 
int numberColumns () const
 Total number of columns in factorization. More...
 
int numberGoodColumns () const
 Number of good columns in factorization. More...
 
void relaxAccuracyCheck (double value)
 Allows change of pivot accuracy check 1.0 == none >1.0 relaxed. More...
 
double getAccuracyCheck () const
 
int maximumPivots () const
 Maximum number of pivots between factorizations. More...
 
virtual void maximumPivots (int value)
 Set maximum pivots. More...
 
double pivotTolerance () const
 Pivot tolerance. More...
 
void pivotTolerance (double value)
 
double zeroTolerance () const
 Zero tolerance. More...
 
void zeroTolerance (double value)
 
double slackValue () const
 Whether slack value is +1 or -1. More...
 
void slackValue (double value)
 
virtual CoinFactorizationDoubleelements () const
 Returns array to put basis elements in. More...
 
virtual int * pivotRow () const
 Returns pivot row. More...
 
virtual CoinFactorizationDoubleworkArea () const
 Returns work area. More...
 
virtual int * intWorkArea () const
 Returns int work area. More...
 
virtual int * numberInRow () const
 Number of entries in each row. More...
 
virtual int * numberInColumn () const
 Number of entries in each column. More...
 
virtual CoinBigIndexstarts () const
 Returns array to put basis starts in. More...
 
virtual int * permuteBack () const
 Returns permute back. More...
 
int solveMode () const
 Get solve mode e.g. More...
 
void setSolveMode (int value)
 Set solve mode e.g. More...
 
virtual bool wantsTableauColumn () const
 Returns true if wants tableauColumn in replaceColumn. More...
 
virtual void setUsefulInformation (const int *info, int whereFrom)
 Useful information for factorization 0 - iteration number whereFrom is 0 for factorize and 1 for replaceColumn. More...
 

Protected Member Functions

int checkPivot (double saveFromU, double oldPivot) const
 Returns accuracy status of replaceColumn returns 0=OK, 1=Probably OK, 2=singular. More...
 

Friends

void CoinDenseFactorizationUnitTest (const std::string &mpsDir)
 

Additional Inherited Members

- Protected Attributes inherited from CoinOtherFactorization
double pivotTolerance_
 Pivot tolerance. More...
 
double zeroTolerance_
 Zero tolerance. More...
 
double slackValue_
 Whether slack value is +1 or -1. More...
 
double relaxCheck_
 Relax check on accuracy in replaceColumn. More...
 
CoinBigIndex factorElements_
 Number of elements after factorization. More...
 
int numberRows_
 Number of Rows in factorization. More...
 
int numberColumns_
 Number of Columns in factorization. More...
 
int numberGoodU_
 Number factorized in U (not row singletons) More...
 
int maximumPivots_
 Maximum number of pivots before factorization. More...
 
int numberPivots_
 Number pivots since last factorization. More...
 
int status_
 Status of factorization. More...
 
int maximumRows_
 Maximum rows ever (i.e. use to copy arrays etc) More...
 
CoinBigIndex maximumSpace_
 Maximum length of iterating area. More...
 
int * pivotRow_
 Pivot row. More...
 
CoinFactorizationDoubleelements_
 Elements of factorization and updates length is maxR*maxR+maxSpace will always be long enough so can have nR*nR ints in maxSpace. More...
 
CoinFactorizationDoubleworkArea_
 Work area of numberRows_. More...
 
int solveMode_
 Solve mode e.g. More...
 

Detailed Description

This deals with Factorization and Updates This is a simple dense version so other people can write a better one.

I am assuming that 32 bits is enough for number of rows or columns, but CoinBigIndex may be redefined to get 64 bits.

Definition at line 285 of file CoinDenseFactorization.hpp.

Constructor & Destructor Documentation

CoinDenseFactorization::CoinDenseFactorization ( )

Default constructor.

CoinDenseFactorization::CoinDenseFactorization ( const CoinDenseFactorization other)

Copy constructor.

virtual CoinDenseFactorization::~CoinDenseFactorization ( )
virtual

Destructor.

Member Function Documentation

CoinDenseFactorization& CoinDenseFactorization::operator= ( const CoinDenseFactorization other)

= copy

virtual CoinOtherFactorization* CoinDenseFactorization::clone ( ) const
virtual

Clone.

Implements CoinOtherFactorization.

virtual void CoinDenseFactorization::getAreas ( int  numberRows,
int  numberColumns,
CoinBigIndex  maximumL,
CoinBigIndex  maximumU 
)
virtual

Gets space for a factorization.

Implements CoinOtherFactorization.

virtual void CoinDenseFactorization::preProcess ( )
virtual

PreProcesses column ordered copy of basis.

Implements CoinOtherFactorization.

virtual int CoinDenseFactorization::factor ( )
virtual

Does most of factorization returning status 0 - OK -99 - needs more memory -1 - singular - use numberGoodColumns and redo.

Implements CoinOtherFactorization.

virtual void CoinDenseFactorization::postProcess ( const int *  sequence,
int *  pivotVariable 
)
virtual

Does post processing on valid factorization - putting variables on correct rows.

Implements CoinOtherFactorization.

virtual void CoinDenseFactorization::makeNonSingular ( int *  sequence,
int  numberColumns 
)
virtual

Makes a non-singular basis by replacing variables.

Implements CoinOtherFactorization.

virtual int CoinDenseFactorization::numberElements ( ) const
inlinevirtual

Total number of elements in factorization.

Implements CoinOtherFactorization.

Definition at line 330 of file CoinDenseFactorization.hpp.

double CoinDenseFactorization::maximumCoefficient ( ) const

Returns maximum absolute value in factorization.

virtual int CoinDenseFactorization::replaceColumn ( CoinIndexedVector regionSparse,
int  pivotRow,
double  pivotCheck,
bool  checkBeforeModifying = false,
double  acceptablePivot = 1.0e-8 
)
virtual

Replaces one Column to basis, returns 0=OK, 1=Probably OK, 2=singular, 3=no room If checkBeforeModifying is true will do all accuracy checks before modifying factorization.

Whether to set this depends on speed considerations. You could just do this on first iteration after factorization and thereafter re-factorize partial update already in U

Implements CoinOtherFactorization.

virtual int CoinDenseFactorization::updateColumnFT ( CoinIndexedVector regionSparse,
CoinIndexedVector regionSparse2,
bool  = false 
)
inlinevirtual

Updates one column (FTRAN) from regionSparse2 Tries to do FT update number returned is negative if no room regionSparse starts as zero and is zero at end.

Note - if regionSparse2 packed on input - will be packed on output

Implements CoinOtherFactorization.

Definition at line 363 of file CoinDenseFactorization.hpp.

virtual int CoinDenseFactorization::updateColumn ( CoinIndexedVector regionSparse,
CoinIndexedVector regionSparse2,
bool  noPermute = false 
) const
virtual

This version has same effect as above with FTUpdate==false so number returned is always >=0.

Implements CoinOtherFactorization.

virtual int CoinDenseFactorization::updateTwoColumnsFT ( CoinIndexedVector regionSparse1,
CoinIndexedVector regionSparse2,
CoinIndexedVector regionSparse3,
bool  noPermute = false 
)
virtual

does FTRAN on two columns

Implements CoinOtherFactorization.

virtual int CoinDenseFactorization::updateColumnTranspose ( CoinIndexedVector regionSparse,
CoinIndexedVector regionSparse2 
) const
virtual

Updates one column (BTRAN) from regionSparse2 regionSparse starts as zero and is zero at end Note - if regionSparse2 packed on input - will be packed on output.

Implements CoinOtherFactorization.

void CoinDenseFactorization::clearArrays ( )
inlinevirtual

Get rid of all memory.

Reimplemented from CoinOtherFactorization.

Definition at line 390 of file CoinDenseFactorization.hpp.

virtual int* CoinDenseFactorization::indices ( ) const
inlinevirtual

Returns array to put basis indices in.

Implements CoinOtherFactorization.

Definition at line 393 of file CoinDenseFactorization.hpp.

virtual int* CoinDenseFactorization::permute ( ) const
inlinevirtual

Returns permute in.

Implements CoinOtherFactorization.

Definition at line 396 of file CoinDenseFactorization.hpp.

void CoinDenseFactorization::gutsOfDestructor ( )

The real work of desstructor.

void CoinDenseFactorization::gutsOfInitialize ( )

The real work of constructor.

void CoinDenseFactorization::gutsOfCopy ( const CoinDenseFactorization other)

The real work of copy.

int CoinDenseFactorization::checkPivot ( double  saveFromU,
double  oldPivot 
) const
protected

Returns accuracy status of replaceColumn returns 0=OK, 1=Probably OK, 2=singular.

Friends And Related Function Documentation

void CoinDenseFactorizationUnitTest ( const std::string &  mpsDir)
friend

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