Procedure GMP::Column::UnfreezeRaw(GMP, colSet)

GMP::Column::UnfreezeRaw

The procedure GMP::Column::UnfreezeRaw removes the frozen status of a group of columns in a generated mathematical program.

GMP::Column::UnfreezeRaw(
     GMP,            ! (input) a generated mathematical program
     colSet          ! (input) a subset of Integers
     )

Arguments

GMP

An element in AllGeneratedMathematicalPrograms.

colSet

A subset of the set Integers, representing a set of column numbers.

Return Value

The procedure returns 1 on success, and 0 otherwise.

Note

During a call to procedure GMP::Column::FreezeRaw AIMMS stores the upper and lower bound of the columns before the procedure was called. This information is used when procedure GMP::Column::UnfreezeRaw is called thereafter. This information is not copied by the function GMP::Instance::Copy.

Example

Assume that MP is a mathematical program. To use GMP::Column::UnfreezeRaw we declare the following identifiers (in ams format):

ElementParameter myGMP {
    Range: AllGeneratedMathematicalPrograms;
}
Set VariableSet {
    SubsetOf: AllVariables;
}
Set ColumnSet {
    SubsetOf: Integers;
    Index: cc;
}

To unfreeze the variable x(i) we can use:

myGMP := GMP::Instance::Generate( MP );

VariableSet := { 'x' };
ColumnSet := GMP::Instance::GetColumnNumbers( myGMP, VariableSet );

GMP::Column::Unfreeze( myGMP, ColumnSet );

See also

• The routines GMP::Instance::Generate, GMP::Instance::GetColumnNumbers, GMP::Column::Unfreeze, GMP::Column::FreezeRaw and GMP::Instance::Copy.