ilog.cplex
Class IloCplex.DeleteMode
java.lang.Object
|
+--ilog.cplex.IloCplex.DeleteMode
- public static class IloCplex.DeleteMode
- extends java.lang.Object
This class lists the possible settings for the delete mode of
IloCplex as controlled by the methods
setDeleteMode and getDeleteMode.
An instance of this class represents a user-written callback in an
application that uses an instance of IloCplex to solve a
mixed integer programming problem (a MIP). This class offers a method to
check on the progress of the cuts.
The constructor and methods of this class are protected for use
in deriving a user-written callback class and in implementing the main
method in it.
If an attempt is made to access information not available to an instance
of this class, an exception is thrown.
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
LeaveBasis
public static final IloCplex.DeleteMode LeaveBasis
- Sets the delete mode to
LeaveBasis.
When the delete mode is set to LeaveBasis, an existing basis
will remain unchanged if variables or constraints are removed from the
loaded LP model. This generally renders the basis unusable for restart
when solving the modified LP and the advance indicator (parameter
AdvInd) is set to IloTrue.
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 the delete mode to
FixBasis.
If the delete mode is set to FixBasis, the
invoking object will do basis pivots in order to maintain a valid basis
when variables or constraints are removed. This makes the delete
operation more computation intensive, but may give a better starting point
for reoptimization after the modification of the extracted model.
If no basis is present in the invoking object, the setting of the
delete mode has no effect.
IloCplex.DeleteMode
public IloCplex.DeleteMode()