IAimmsMathProgramMatrixManipulationInfo::GetNextChangedColumns Method

Get modified columns.

virtual _LONG_T GetNextChangedColumns(
    _LONG_T max_no, 
    _LONG_T col_no[], 
    double ub[], 
    double lb[], 
    _LONG_T type_flag[]
) = 0;

Parameters

Parameters	Description
_LONG_T max_no	Maximum number of columns to retrieve.
_LONG_T col_no[]	Array with the column numbers. Length must be at least max_no.
double ub[]	Array with the upper bounds of the columns. Length must be at least max_no.
double lb[]	Array with the lower bounds of the columns. Length must be at least max_no.
_LONG_T type_flag[]	Array of bit fields that specify column (modification) properties. Flags are taken from IAimmsMathProgramInfo::ColumnRowFlag enumeration. Length must be at least max_no.

Returns

The GetNextChangedColumns method returns the actual number of columns retrieved.

Description

The GetNextChangedColumns method is used to get columns from AIMMS that were changed after a solve using GMP modifications. This method should only be called if the capability flag SolverCapability::CAPAB_MATRIX_MANIP has been set in the GetInitialInfo method.

Remarks

The number of changed columns is equal to the value of parameter IntegerMathProgramInfo::IPARAM_MM_CHG_C, as passed to the DoSolve method.
If max_no is greater than or equal to the number of changed columns in the problem, you get all column data using a single call to this method.
If max_no is smaller than the number of changed columns then you request for a block-wise retrieval, and you must call GetNextChangedColumns repeatedly, until all changed columns are retrieved.

Group

IAimmsMathProgramMatrixManipulationInfo Methods

Links

IAimmsMathProgramMatrixManipulationInfo Class, IAimmsMathProgramMatrixManipulationInfo Members, IAimmsMathProgramMatrixManipulationInfo Methods

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