Matrix Manipulation Functions

AIMMS supports the following matrix manipulation functions:

• MatrixActivateRow

• MatrixAddColumn

• MatrixAddRow

• MatrixDeactivateRow

• MatrixFreezeColumn

• MatrixGenerate

• MatrixModifyCoefficient

• MatrixModifyColumnType

• MatrixModifyDirection

• MatrixModifyLeftHandSide

• MatrixModifyLowerBound

• MatrixModifyQuadraticCoefficient

• MatrixModifyRightHandSide

• MatrixModifyRowType

• MatrixModifyType

• MatrixModifyUpperBound

• MatrixRegenerateRow

• MatrixRestoreState

• MatrixSaveState

• MatrixSolve

• MatrixUnfreezeColumn

In addition, the following function can be used the add cuts during the solution process of a mixed integer program:

• GenerateCut

Note

As of AIMMS release 3.5, the matrix manipulation procedures have become deprecated. New projects should use the GMP library instead. Please refer to Table 5 for a mapping of the matrix manipulation procedures to corresponding GMP functions. AIMMS versions prior to version 3.5, also supported a collection of matrix manipulation procedures with more limited functionality. Although these procedures will remain to be supported for all AIMMS 3.x versions, they have become deprecated. The deprecated manipulation procedures and their GMP counterparts in AIMMS 3.5 and higher are listed in Table 5.

Table 5 Deprecated matrix manipulation procedures

Deprecated Procedure	Counterpart
MatrixModifyCoefficient	GMP::Coefficient::Set
MatrixModifyQuadraticCoefficient	GMP::Coefficient::SetQuadratic
MatrixModifyRightHandSide	GMP::Row::SetRightHandSide
MatrixModifyLeftHandSide	GMP::Row::SetLeftHandSide
MatrixModifyRowType	GMP::Row::SetType
MatrixAddRow	GMP::Row::Add
MatrixRegenerateRow	GMP::Row::Generate
MatrixDeactivateRow	GMP::Row::Deactivate
MatrixActivateRow	GMP::Row::Activate
MatrixModifyLowerBound	GMP::Column::SetLowerBound
MatrixModifyUpperBound	GMP::Column::SetUpperBound
MatrixModifyColumnType	GMP::Column::SetType
MatrixAddColumn	GMP::Column::Add
MatrixFreezeColumn	GMP::Column::Freeze
MatrixUnfreezeColumn	GMP::Column::Unfreeze
MatrixModifyType	GMP::Instance::SetMathematicalProgrammingType
MatrixModifyDirection	GMP::Instance::SetDirection
MatrixGenerate	GMP::Instance::Generate
MatrixSolve	GMP::Instance::Solve, GMP::SolverSession::Execute
MatrixSaveState	GMP::Instance::Copy
MatrixRestoreState	GMP::Instance::Copy