# ClpNetworkBasis Class Reference

This deals with Factorization and Updates for network structures. More...

`#include <ClpNetworkBasis.hpp>`

Collaboration diagram for ClpNetworkBasis:
[legend]

List of all members.

## Public Member Functions
Constructors and destructor and copy
| ClpNetworkBasis ()
| Default constructor.
| ClpNetworkBasis (const ClpSimplex *model, int numberRows, const CoinFactorizationDouble *pivotRegion, const int *permuteBack, const CoinBigIndex *startColumn, const int *numberInColumn, const int *indexRow, const CoinFactorizationDouble *element)
| Constructor from CoinFactorization.
| ClpNetworkBasis (const ClpNetworkBasis &other)
| Copy constructor.
| ~ClpNetworkBasis ()
| Destructor.
ClpNetworkBasis & | operator= (const ClpNetworkBasis &other)
| = copy
Do factorization
int | factorize (const ClpMatrixBase *matrix, int rowIsBasic[], int columnIsBasic[])
| When part of LP - given by basic variables.
rank one updates which do exist
int | replaceColumn (CoinIndexedVector *column, int pivotRow)
| Replaces one Column to basis, returns 0=OK, 1=Probably OK, 2=singular!!
various uses of factorization (return code number elements)
which user may want to know about
double | updateColumn (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2, int pivotRow)
| Updates one column (FTRAN) from region, Returns pivot value if "pivotRow" >=0.
int | updateColumn (CoinIndexedVector *regionSparse, double array[]) const
| Updates one column (FTRAN) to/from array For large problems you should ALWAYS know where the nonzeros are, so please try and migrate to previous method after you have got code working using this simple method - thank you! (the only exception is if you know input is dense e.g.
int | updateColumnTranspose (CoinIndexedVector *regionSparse, double array[]) const
| Updates one column transpose (BTRAN) For large problems you should ALWAYS know where the nonzeros are, so please try and migrate to previous method after you have got code working using this simple method - thank you! (the only exception is if you know input is dense e.g.
int | updateColumnTranspose (CoinIndexedVector *regionSparse, CoinIndexedVector *regionSparse2) const
| Updates one column (BTRAN) from region2.
## Private Member Functions
void | check ()
void | print ()
## Private Attributes
data
double | slackValue_
| Whether slack value is +1 or -1.
int | numberRows_
| Number of Rows in factorization.
int | numberColumns_
| Number of Columns in factorization.
const ClpSimplex * | model_
| model
int * | parent_
| Parent for each column.
int * | descendant_
| Descendant.
int * | pivot_
| Pivot row.
int * | rightSibling_
| Right sibling.
int * | leftSibling_
| Left sibling.
double * | sign_
| Sign of pivot.
int * | stack_
| Stack.
int * | permute_
| Permute into array.
int * | permuteBack_
| Permute back array.
int * | stack2_
| Second stack.
int * | depth_
| Depth.
char * | mark_
| To mark rows.

## Detailed Description

This deals with Factorization and Updates for network structures.

Definition at line 26 of file ClpNetworkBasis.hpp.

## Constructor & Destructor Documentation

ClpNetworkBasis::ClpNetworkBasis | ( |  | ) |

Default constructor.

ClpNetworkBasis::ClpNetworkBasis | ( | const ClpSimplex * | model,
|  | int | numberRows,
|  | const CoinFactorizationDouble * | pivotRegion,
|  | const int * | permuteBack,
|  | const CoinBigIndex * | startColumn,
|  | const int * | numberInColumn,
|  | const int * | indexRow,
|  | const CoinFactorizationDouble * | element |
| ) |  |  |

Constructor from CoinFactorization.

ClpNetworkBasis::ClpNetworkBasis | ( | const ClpNetworkBasis & | other | ) |

Copy constructor.

ClpNetworkBasis::~ClpNetworkBasis | ( |  | ) |

Destructor.

## Member Function Documentation

ClpNetworkBasis& ClpNetworkBasis::operator= | ( | const ClpNetworkBasis & | other | ) |

= copy

int ClpNetworkBasis::factorize | ( | const ClpMatrixBase * | matrix,
|  | int | rowIsBasic[],
|  | int | columnIsBasic[] |
| ) |  |  |

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. 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

int ClpNetworkBasis::replaceColumn | ( | CoinIndexedVector * | column,
|  | int | pivotRow |
| ) |  |  |

Replaces one Column to basis, returns 0=OK, 1=Probably OK, 2=singular!!

double ClpNetworkBasis::updateColumn | ( | CoinIndexedVector * | regionSparse,
|  | CoinIndexedVector * | regionSparse2,
|  | int | pivotRow |
| ) |  |  |

Updates one column (FTRAN) from region, Returns pivot value if "pivotRow" >=0.

int ClpNetworkBasis::updateColumn | ( | CoinIndexedVector * | regionSparse,
|  | double | array[] |
| ) |  |  | const

Updates one column (FTRAN) to/from array For large problems you should ALWAYS know where the nonzeros are, so please try and migrate to previous method after you have got code working using this simple method - thank you! (the only exception is if you know input is dense e.g.

rhs)

int ClpNetworkBasis::updateColumnTranspose | ( | CoinIndexedVector * | regionSparse,
|  | double | array[] |
| ) |  |  | const

Updates one column transpose (BTRAN) For large problems you should ALWAYS know where the nonzeros are, so please try and migrate to previous method after you have got code working using this simple method - thank you! (the only exception is if you know input is dense e.g.

dense objective) returns number of nonzeros

int ClpNetworkBasis::updateColumnTranspose | ( | CoinIndexedVector * | regionSparse,
|  | CoinIndexedVector * | regionSparse2 |
| ) |  |  | const

Updates one column (BTRAN) from region2.

void ClpNetworkBasis::check | ( |  | ) | `[private]`

void ClpNetworkBasis::print | ( |  | ) | `[private]`

## Member Data Documentation

double ClpNetworkBasis::slackValue_`[private]`

Whether slack value is +1 or -1.

Definition at line 112 of file ClpNetworkBasis.hpp.

int ClpNetworkBasis::numberRows_`[private]`

Number of Rows in factorization.

Definition at line 115 of file ClpNetworkBasis.hpp.

int ClpNetworkBasis::numberColumns_`[private]`

Number of Columns in factorization.

Definition at line 117 of file ClpNetworkBasis.hpp.

const ClpSimplex* ClpNetworkBasis::model_`[private]`

model

Definition at line 119 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::parent_`[private]`

Parent for each column.

Definition at line 121 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::descendant_`[private]`

Descendant.

Definition at line 123 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::pivot_`[private]`

Pivot row.

Definition at line 125 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::rightSibling_`[private]`

Right sibling.

Definition at line 127 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::leftSibling_`[private]`

Left sibling.

Definition at line 129 of file ClpNetworkBasis.hpp.

double* ClpNetworkBasis::sign_`[private]`

Sign of pivot.

Definition at line 131 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::stack_`[private]`

Stack.

Definition at line 133 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::permute_`[private]`

Permute into array.

Definition at line 135 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::permuteBack_`[private]`

Permute back array.

Definition at line 137 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::stack2_`[private]`

Second stack.

Definition at line 139 of file ClpNetworkBasis.hpp.

int* ClpNetworkBasis::depth_`[private]`

Depth.

Definition at line 141 of file ClpNetworkBasis.hpp.

char* ClpNetworkBasis::mark_`[private]`

To mark rows.

Definition at line 143 of file ClpNetworkBasis.hpp.

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

- /home/coin/svn-release/Alps-1.4.5/Clp/src/ClpNetworkBasis.hpp