ilog.cplex

Class IloCplex.DeleteMode

java.lang.Object

ilog.cplex.IloCplex.DeleteMode

Enclosing class:

IloCplex

public static class IloCplex.DeleteMode
extends java.lang.Object

Enumeration of possible values for the delete mode of IloCplex, as controlled by the methods setDeleteMode and getDeleteMode.

Field Summary

Fields

Modifier and Type	Field and Description
static IloCplex.DeleteMode	FixBasis Sets fix basis as the delete mode.
static IloCplex.DeleteMode	LeaveBasis Sets leave basis as the delete mode.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LeaveBasis

public static final IloCplex.DeleteMode LeaveBasis

Sets leave basis as the delete mode.

If the delete mode is set to IloCplex.DeleteMode.LeaveBasis, an existing basis will remain unchanged if variables or constraints are removed from the loaded LP model. This situation may render the basis unusable for restarting optimization on the modified LP.

If no basis is present in the invoking object, the setting of the delete mode has no effect.

FixBasis

public static final IloCplex.DeleteMode FixBasis

Sets fix basis as the delete mode.

If the delete mode is set to IloCplex.DeleteMode.FixBasis, the invoking object will do basis pivots in order to maintain a valid basis when variables or constraints are removed. This situation makes the delete operation more computation intensive, but it may provide a better starting point for reoptimization after the modification of the active model.

If no basis is present in the invoking object, the setting of the delete mode has no effect.