ClpFactorization Class Reference

This just implements CoinFactorization when an ClpMatrixBase object is passed. More...

#include <ClpFactorization.hpp>

Collaboration diagram for ClpFactorization:

Collaboration graph
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List of all members.

Public Member Functions

factorization
int factorize (ClpSimplex *model, int solveType, bool valuesPass)
 When part of LP - given by basic variables.
Constructors, destructor
 ClpFactorization ()
 Default constructor.
 ~ClpFactorization ()
 Destructor.
Copy method
 ClpFactorization (const ClpFactorization &)
 The copy constructor.
 ClpFactorization (const CoinFactorization &)
 The copy constructor from an CoinFactorization.
 ClpFactorization (const CoinDenseFactorization &)
 The copy constructor from an CoinDenseFactorization.
ClpFactorizationoperator= (const ClpFactorization &)
 The copy constructor.
rank one updates which do exist
int replaceColumn (const ClpSimplex *model, CoinIndexedVector *regionSparse, CoinIndexedVector *tableauColumn, int pivotRow, double pivotCheck, bool checkBeforeModifying=false)
 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.
various uses of factorization (return code number elements)
which user may want to know about

int updateColumnFT (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2)
 Updates one column (FTRAN) from region2 Tries to do FT update number returned is negative if no room region1 starts as zero and is zero at end.
int updateColumn (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2, bool noPermute=false) const
 Updates one column (FTRAN) from region2 region1 starts as zero and is zero at end.
int updateTwoColumnsFT (CoinIndexedVector *regionSparse1, CoinIndexedVector *regionSparse2, CoinIndexedVector *regionSparse3, bool noPermuteRegion3=false)
 Updates one column (FTRAN) from region2 Tries to do FT update number returned is negative if no room.
int updateColumnForDebug (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2, bool noPermute=false) const
 For debug (no statistics update).
int updateColumnTranspose (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2) const
 Updates one column (BTRAN) from region2 region1 starts as zero and is zero at end.
Lifted from CoinFactorization
int numberElements () const
 Total number of elements in factorization.
int * permute () const
 Returns address of permute region.
int * pivotColumn () const
 Returns address of pivotColumn region (also used for permuting).
int maximumPivots () const
 Maximum number of pivots between factorizations.
void maximumPivots (int value)
 Set maximum number of pivots between factorizations.
int pivots () const
 Returns number of pivots since factorization.
double areaFactor () const
 Whether larger areas needed.
void areaFactor (double value)
 Set whether larger areas needed.
double zeroTolerance () const
 Zero tolerance.
void zeroTolerance (double value)
 Set zero tolerance.
int sparseThreshold () const
 get sparse threshold
void sparseThreshold (int value)
 Set sparse threshold.
int status () const
 Returns status.
void setStatus (int value)
 Sets status.
int numberDense () const
 Returns number of dense rows.
bool timeToRefactorize () const
 Total number of elements in factorization.
int messageLevel () const
 Level of detail of messages.
void messageLevel (int value)
 Set level of detail of messages.
void clearArrays ()
 Get rid of all memory.
int numberRows () const
 Number of Rows after factorization.
int denseThreshold () const
 Gets dense threshold.
void setDenseThreshold (int value)
 Sets dense threshold.
double pivotTolerance () const
 Pivot tolerance.
void pivotTolerance (double value)
 Set pivot tolerance.
void relaxAccuracyCheck (double value)
 Allows change of pivot accuracy check 1.0 == none >1.0 relaxed.
int persistenceFlag () const
 Array persistence flag If 0 then as now (delete/new) 1 then only do arrays if bigger needed 2 as 1 but give a bit extra if bigger needed.
void setPersistenceFlag (int value)
 Total number of elements in factorization.
void almostDestructor ()
 Delete all stuff (leaves as after CoinFactorization()).
double adjustedAreaFactor () const
 Returns areaFactor but adjusted for dense.
void setBiasLU (int value)
 Total number of elements in factorization.
void setForrestTomlin (bool value)
 true if Forrest Tomlin update, false if PFI
void setDefaultValues ()
 Sets default values.
int goDenseThreshold () const
 Get switch to dense if number rows <= this.
void setGoDenseThreshold (int value)
 Set switch to dense if number rows <= this.
void goDense ()
 Go over to dense code.
int isDense () const
 Return 1 if dense code.
other stuff
void goSparse ()
 makes a row copy of L for speed and to allow very sparse problems
void cleanUp ()
 Cleans up i.e. gets rid of network basis.
bool needToReorder () const
 Says whether to redo pivot order.
bool networkBasis () const
 Says if a network basis.
void getWeights (int *weights) const
 Fills weighted row list.

Private Attributes

data
ClpNetworkBasisnetworkBasis_
 Pointer to network basis.
CoinFactorization * coinFactorizationA_
 Pointer to CoinFactorization.
CoinDenseFactorization * coinFactorizationB_
 Pointer to CoinDenseFactorization.
int goDenseThreshold_
 Switch to dense if number rows <= this.


Detailed Description

This just implements CoinFactorization when an ClpMatrixBase object is passed.

If a network then has a dummy CoinFactorization and a genuine ClpNetworkBasis object

Definition at line 22 of file ClpFactorization.hpp.


Constructor & Destructor Documentation

ClpFactorization::ClpFactorization (  ) 

Default constructor.

ClpFactorization::~ClpFactorization (  ) 

Destructor.

ClpFactorization::ClpFactorization ( const ClpFactorization  ) 

The copy constructor.

ClpFactorization::ClpFactorization ( const CoinFactorization &   ) 

The copy constructor from an CoinFactorization.

ClpFactorization::ClpFactorization ( const CoinDenseFactorization &   ) 

The copy constructor from an CoinDenseFactorization.


Member Function Documentation

int ClpFactorization::factorize ( ClpSimplex model,
int  solveType,
bool  valuesPass 
)

When part of LP - given by basic variables.

Actually does factorization. Arrays passed in have non negative value to say basic. If status is okay, basic variables have pivot row - this is only needed if increasingRows_ >1. Allows scaling If status is singular, then basic variables have pivot row and ones thrown out have -1 returns 0 -okay, -1 singular, -2 too many in basis, -99 memory

ClpFactorization& ClpFactorization::operator= ( const ClpFactorization  ) 

The copy constructor.

int ClpFactorization::replaceColumn ( const ClpSimplex model,
CoinIndexedVector *  regionSparse,
CoinIndexedVector *  tableauColumn,
int  pivotRow,
double  pivotCheck,
bool  checkBeforeModifying = false 
)

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

int ClpFactorization::updateColumnFT ( CoinIndexedVector *  regionSparse,
CoinIndexedVector *  regionSparse2 
)

Updates one column (FTRAN) from region2 Tries to do FT update number returned is negative if no room region1 starts as zero and is zero at end.

int ClpFactorization::updateColumn ( CoinIndexedVector *  regionSparse,
CoinIndexedVector *  regionSparse2,
bool  noPermute = false 
) const

Updates one column (FTRAN) from region2 region1 starts as zero and is zero at end.

int ClpFactorization::updateTwoColumnsFT ( CoinIndexedVector *  regionSparse1,
CoinIndexedVector *  regionSparse2,
CoinIndexedVector *  regionSparse3,
bool  noPermuteRegion3 = false 
)

Updates one column (FTRAN) from region2 Tries to do FT update number returned is negative if no room.

Also updates region3 region1 starts as zero and is zero at end

int ClpFactorization::updateColumnForDebug ( CoinIndexedVector *  regionSparse,
CoinIndexedVector *  regionSparse2,
bool  noPermute = false 
) const

For debug (no statistics update).

int ClpFactorization::updateColumnTranspose ( CoinIndexedVector *  regionSparse,
CoinIndexedVector *  regionSparse2 
) const

Updates one column (BTRAN) from region2 region1 starts as zero and is zero at end.

int ClpFactorization::numberElements (  )  const [inline]

Total number of elements in factorization.

Definition at line 122 of file ClpFactorization.hpp.

int* ClpFactorization::permute (  )  const [inline]

Returns address of permute region.

Definition at line 126 of file ClpFactorization.hpp.

int* ClpFactorization::pivotColumn (  )  const [inline]

Returns address of pivotColumn region (also used for permuting).

Definition at line 130 of file ClpFactorization.hpp.

int ClpFactorization::maximumPivots (  )  const [inline]

Maximum number of pivots between factorizations.

Definition at line 134 of file ClpFactorization.hpp.

void ClpFactorization::maximumPivots ( int  value  )  [inline]

Set maximum number of pivots between factorizations.

Definition at line 138 of file ClpFactorization.hpp.

int ClpFactorization::pivots (  )  const [inline]

Returns number of pivots since factorization.

Definition at line 142 of file ClpFactorization.hpp.

double ClpFactorization::areaFactor (  )  const [inline]

Whether larger areas needed.

Definition at line 146 of file ClpFactorization.hpp.

void ClpFactorization::areaFactor ( double  value  )  [inline]

Set whether larger areas needed.

Definition at line 150 of file ClpFactorization.hpp.

double ClpFactorization::zeroTolerance (  )  const [inline]

Zero tolerance.

Definition at line 154 of file ClpFactorization.hpp.

void ClpFactorization::zeroTolerance ( double  value  )  [inline]

Set zero tolerance.

Definition at line 158 of file ClpFactorization.hpp.

int ClpFactorization::sparseThreshold (  )  const [inline]

get sparse threshold

Definition at line 162 of file ClpFactorization.hpp.

void ClpFactorization::sparseThreshold ( int  value  )  [inline]

Set sparse threshold.

Definition at line 165 of file ClpFactorization.hpp.

int ClpFactorization::status (  )  const [inline]

Returns status.

Definition at line 168 of file ClpFactorization.hpp.

void ClpFactorization::setStatus ( int  value  )  [inline]

Sets status.

Definition at line 172 of file ClpFactorization.hpp.

int ClpFactorization::numberDense (  )  const [inline]

Returns number of dense rows.

Definition at line 176 of file ClpFactorization.hpp.

bool ClpFactorization::timeToRefactorize (  )  const [inline]

Total number of elements in factorization.

Definition at line 192 of file ClpFactorization.hpp.

int ClpFactorization::messageLevel (  )  const [inline]

Level of detail of messages.

Definition at line 204 of file ClpFactorization.hpp.

void ClpFactorization::messageLevel ( int  value  )  [inline]

Set level of detail of messages.

Definition at line 208 of file ClpFactorization.hpp.

void ClpFactorization::clearArrays (  )  [inline]

Get rid of all memory.

Definition at line 212 of file ClpFactorization.hpp.

int ClpFactorization::numberRows (  )  const [inline]

Number of Rows after factorization.

Definition at line 215 of file ClpFactorization.hpp.

int ClpFactorization::denseThreshold (  )  const [inline]

Gets dense threshold.

Definition at line 219 of file ClpFactorization.hpp.

void ClpFactorization::setDenseThreshold ( int  value  )  [inline]

Sets dense threshold.

Definition at line 222 of file ClpFactorization.hpp.

double ClpFactorization::pivotTolerance (  )  const [inline]

Pivot tolerance.

Definition at line 225 of file ClpFactorization.hpp.

void ClpFactorization::pivotTolerance ( double  value  )  [inline]

Set pivot tolerance.

Definition at line 229 of file ClpFactorization.hpp.

void ClpFactorization::relaxAccuracyCheck ( double  value  )  [inline]

Allows change of pivot accuracy check 1.0 == none >1.0 relaxed.

Definition at line 233 of file ClpFactorization.hpp.

int ClpFactorization::persistenceFlag (  )  const [inline]

Array persistence flag If 0 then as now (delete/new) 1 then only do arrays if bigger needed 2 as 1 but give a bit extra if bigger needed.

Definition at line 240 of file ClpFactorization.hpp.

void ClpFactorization::setPersistenceFlag ( int  value  )  [inline]

Total number of elements in factorization.

Definition at line 242 of file ClpFactorization.hpp.

void ClpFactorization::almostDestructor (  )  [inline]

Delete all stuff (leaves as after CoinFactorization()).

Definition at line 245 of file ClpFactorization.hpp.

double ClpFactorization::adjustedAreaFactor (  )  const [inline]

Returns areaFactor but adjusted for dense.

Definition at line 248 of file ClpFactorization.hpp.

void ClpFactorization::setBiasLU ( int  value  )  [inline]

Total number of elements in factorization.

Definition at line 250 of file ClpFactorization.hpp.

void ClpFactorization::setForrestTomlin ( bool  value  )  [inline]

true if Forrest Tomlin update, false if PFI

Definition at line 253 of file ClpFactorization.hpp.

void ClpFactorization::setDefaultValues (  )  [inline]

Sets default values.

Definition at line 256 of file ClpFactorization.hpp.

int ClpFactorization::goDenseThreshold (  )  const [inline]

Get switch to dense if number rows <= this.

Definition at line 266 of file ClpFactorization.hpp.

void ClpFactorization::setGoDenseThreshold ( int  value  )  [inline]

Set switch to dense if number rows <= this.

Definition at line 269 of file ClpFactorization.hpp.

void ClpFactorization::goDense (  ) 

Go over to dense code.

int ClpFactorization::isDense (  )  const [inline]

Return 1 if dense code.

Definition at line 274 of file ClpFactorization.hpp.

void ClpFactorization::goSparse (  ) 

makes a row copy of L for speed and to allow very sparse problems

void ClpFactorization::cleanUp (  ) 

Cleans up i.e. gets rid of network basis.

bool ClpFactorization::needToReorder (  )  const

Says whether to redo pivot order.

bool ClpFactorization::networkBasis (  )  const [inline]

Says if a network basis.

Definition at line 306 of file ClpFactorization.hpp.

void ClpFactorization::getWeights ( int *  weights  )  const

Fills weighted row list.


Member Data Documentation

Pointer to network basis.

Definition at line 324 of file ClpFactorization.hpp.

CoinFactorization* ClpFactorization::coinFactorizationA_ [private]

Pointer to CoinFactorization.

Definition at line 328 of file ClpFactorization.hpp.

CoinDenseFactorization* ClpFactorization::coinFactorizationB_ [private]

Pointer to CoinDenseFactorization.

Definition at line 330 of file ClpFactorization.hpp.

Switch to dense if number rows <= this.

Definition at line 332 of file ClpFactorization.hpp.


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

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