CoinBuild

In many cases it is natural to build a model by adding one row at a time.

Description

In Coin this is inefficient so this class gives some help. An instance of CoinBuild can be built up more efficiently and then added to the Clp/OsiModel in one go. It may be more efficient to have fewer arrays and re-allocate them but this should give a large gain over addRow. I have now extended it to columns.

Public Methods

`addRow`

add a row

void addRow(int numberInRow, const int * columns, const double * elements, double rowLower = -, double rowUpper)

Parameters:

numberInRow (int)
columns (const int *)
elements (const double *)
rowLower (double)
rowUpper (double)

`addColumn`

add a column

void addColumn(int numberInColumn, const int * rows, const double * elements, double columnLower = 0.0, double columnUpper, double objectiveValue = 0.0)

Parameters:

numberInColumn (int)
rows (const int *)
elements (const double *)
columnLower (double)
columnUpper (double)
objectiveValue (double)

`addCol`

add a column

void addCol(int numberInColumn, const int * rows, const double * elements, double columnLower = 0.0, double columnUpper, double objectiveValue = 0.0)

Parameters:

numberInColumn (int)
rows (const int *)
elements (const double *)
columnLower (double)
columnUpper (double)
objectiveValue (double)

`numberRows`

Return number of rows or maximum found so far.

int numberRows()

`numberColumns`

Return number of columns or maximum found so far.

int numberColumns()

`numberElements`

Return number of elements.

CoinBigIndex numberElements()

`row`

Returns number of elements in a row and information in row.

int row(int whichRow, double & rowLower, double & rowUpper, const int *& indices, const double *& elements)

Parameters:

whichRow (int)
rowLower (double &)
rowUpper (double &)
indices (const int *&)
elements (const double *&)

`currentRow`

Returns number of elements in current row and information in row Used as rows may be stored in a chain.

int currentRow(double & rowLower, double & rowUpper, const int *& indices, const double *& elements)

Parameters:

rowLower (double &)
rowUpper (double &)
indices (const int *&)
elements (const double *&)

`setCurrentRow`

Set current row.

void setCurrentRow(int whichRow)

Parameters:

whichRow (int)

`currentRow`

Returns current row number.

int currentRow()

`column`

Returns number of elements in a column and information in column.

int column(int whichColumn, double & columnLower, double & columnUpper, double & objectiveValue, const int *& indices, const double *& elements)

Parameters:

whichColumn (int)
columnLower (double &)
columnUpper (double &)
objectiveValue (double &)
indices (const int *&)
elements (const double *&)

`currentColumn`

Returns number of elements in current column and information in column Used as columns may be stored in a chain.

int currentColumn(double & columnLower, double & columnUpper, double & objectiveValue, const int *& indices, const double *& elements)

Parameters:

columnLower (double &)
columnUpper (double &)
objectiveValue (double &)
indices (const int *&)
elements (const double *&)

`setCurrentColumn`

Set current column.

void setCurrentColumn(int whichColumn)

Parameters:

whichColumn (int)

`currentColumn`

Returns current column number.

int currentColumn()

`type`

Returns type.

Type type()

`CoinBuild`

Default constructor.

 CoinBuild()

`CoinBuild`

Constructor with type Type::Row == for addRow, Type::Column == for addColumn.

 CoinBuild(Type type)

Parameters:

type (Type)

`~CoinBuild`

Destructor.

 ~CoinBuild()

`CoinBuild`

The copy constructor.

 CoinBuild(const CoinBuild & )

Parameters:

`` (const CoinBuild &)

`operator=`

CoinBuild & operator=(const CoinBuild & )

Parameters:

`` (const CoinBuild &)

Source

Header: layer-0/CoinUtils/src/CoinBuild.hpp

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