/// <summary>
/// Perform the row operations of the simplex algorithm with the selected pivot column and row.
/// </summary>
/// <param name="pivotCol">the pivot column</param>
/// <param name="pivotRow">the pivot row</param>
public void PerformRowOperations(int pivotCol, int pivotRow)
{
// set the pivot element to 1
T pivotVal = GetEntry(pivotRow, pivotCol);
DivideRow(pivotRow, pivotVal);
// set the rest of the pivot column to 0
for (int i = 0; i < Height; i++)
{
if (i != pivotRow)
{
T multiplier = GetEntry(i, pivotCol);
if (!Policy.IsZero(multiplier))
{
SubtractRow(i, pivotRow, multiplier);
}
}
}
// update the basic variable mappings
int previousBasicVariable = GetBasicVariable(pivotRow);
basicVariables[previousBasicVariable] = -1;
basicVariables[pivotCol] = pivotRow;
basicRows[pivotRow] = pivotCol;
}
/// <summary>
/// True if numerator is zero
/// </summary>
/// <returns></returns>
public bool IsZero()
{
return(Policy.IsZero(Numerator));
}
