Initializing help system before first use

SetIndicators Method

Specifies that a set of rows in the matrix will be treated as indicator constraints during a tree search. An indicator constraint is made of a condition and a constraint. The condition is of the type "bin = value", where bin is a binary variable and value is either 0 or 1. The constraint is any matrix row (may be linear, quadratic or general nonlinear). During tree search, a row configured as an indicator constraint is enforced only when condition holds, that is only if the indicator variable bin has the specified value. Note that every row may only get assigned a single indicator variable and term. If a row needs to be activated by multiple different terms, the row needs to be duplicated so that each term can be assigned to a distinct row. If the indicator variable should be changed, the old term needs to be deleted first (by calling delIndicators or by calling this function with a comps argument of 0) before assigning a new one.

Namespace:   Optimizer
Assembly:  xprsdn (in xprsdn.dll) Version: 44.01.04
Syntax
C# 
public void SetIndicators(
	int nrows,
	int[] rowind,
	int[] colind,
	int[] complement
)

Parameters

nrows
Type:  System.Int32
The number of indicator constraints.
rowind
Type:  System.Int32
Integer array of length nrows containing the indices of the rows that define the constraint part for the indicator constraints.
colind
Type:  System.Int32
Integer array of length nrows containing the column indices of the indicator variables.
complement
Type:  System.Int32
Integer array of length nrows with the complement flags:
  • 0: not an indicator constraint (in this case the corresponding entry in the colind array is ignored);
  • 1: for indicator constraints with condition "bin = 1";
  • -1: for indicator constraints with condition "bin = 0".
Remarks
See Also
Parent Topic XPRSprob Methods

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