Procedure MatrixFreezeColumn(MP, row, value)

MatrixFreezeColumn

The procedure MatrixFreezeColumn fixes the value of a column in the model. The column can be freed by using MatrixUnfreezeColumn.

MatrixFreezeColumn(
     MP,             ! (input) a mathematical program
     column,         ! (input) a scalar value
     value           ! (input) a numerical expression
     )

Arguments

MP

A mathematical program that was previously solved. The mathematical program should be a linear or mixed-integer linear programming model.

row

A scalar reference to an existing column in the matrix.

value

The value to which the column should be fixed.

Return Value

The procedure returns 1 on success, or 0 otherwise.

Note

  • Fixing a column to a certain value has the same effect as changing the lower and upper bound into that value.

  • 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 procedures.

See also

The procedures MatrixModifyLowerBound, MatrixModifyUpperBound, MatrixUnfreezeColumn. Matrix manipulation routines are discussed in more detail in Implementing Advanced Algorithms for Mathematical Programs of the Language Reference.