[Cbc] change matrix coefficient at coin-cbc.

[Ivan Meireles Costa]

Hi guys,

I'm working on my first project with coin-or cbc and have one problem to
change a coefficient in the matrix in my OsiCbcSolverInterface.
I've tried:

bool OPT_COIN::chgCoef( int row, int col, double newcoef )
{
    bool ret = true;
    CoinPackedMatrix *matrix = lp->getMutableMatrixByRow();



    if(matrix == NULL)
    {
        printf("\n\n\nNULL\n\n\n");
    }
    matrix->modifyCoefficient(row, col, newcoef);


    return ret;
}

but the method "getMutableMatrixByRow()" is not yet implemented, it return
NULL.

thanks




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