PresolveRow Method (Char, Int32, Int32[], Double[], Double, Int32, Int32, Int32[], Double[], Double, Int32)

public void PresolveRow(
	char rowtype,
	int norigcoefs,
	int[] origcolind,
	double[] origrowcoef,
	double origrhs,
	int maxcoefs,
	out int p_ncoefs,
	int[] colind,
	double[] rowcoef,
	out double p_rhs,
	out int p_status
)

Parameters

rowtype

Type:  System.Char
The type of the row:

• L: indicates a <= row;
• G: indicates a >= row.

norigcoefs

Type:  System.Int32
Number of elements in the origcolind and origrowcoef arrays.

origcolind

Type:  System.Int32
Integer array of length norigcoefs containing the column indices of the row to presolve.

origrowcoef

Type:  System.Double
Double array of length norigcoefs containing the non-zero coefficients of the row to presolve.

origrhs

Type:  System.Double
The right-hand side constant of the row to presolve.

maxcoefs

Type:  System.Int32
Maximum number of elements to return in the colind and rowcoef arrays.

p_ncoefs

Type:  System.Int32
Pointer to the integer where the number of elements in the colind and rowcoef arrays will be returned.

colind

Type:  System.Int32
Integer array which will be filled with the column indices of the presolved row. It must be allocated to hold at least COLS elements.

rowcoef

Type:  System.Double
Double array which will be filled with the coefficients of the presolved row. It must be allocated to hold at least COLS elements.

p_rhs

Type:  System.Double
Pointer to the double where the presolved right-hand side will be returned.

p_status

Type:  System.Int32
Status of the presolved row:

• -3: Failed to presolve the row due to presolve dual reductions;
• -2: Failed to presolve the row due to presolve duplicate column reductions;
• -1: Failed to presolve the row due to an error. Check the Optimizer error code for the cause;
• 0: The row was successfully presolved;
• 1: The row was presolved, but may be relaxed.

• TSP

Reference