Solution analysis methods and routines give further information about a solution. As the solutions are computed with finite-precision arithmetic, there may be some numeric residuals; the quality routines give information about what these numeric residuals are. The sensitivity analysis routines give information about how the solution would change if some aspect of the problem is changed; these routines require a simplex basis, so they may be used only after a simplex optimization of an LP.
Note: Names of classes, methods, and symbolic constants in the .NET API correspond very closely to those in the Java API with these systematic exceptions:
Ilo
, whereas in .NET they do not.
addCols
,
whereas in the .NET API, the names of methods conventionally
begin with an uppercase (that is, capital) letter, for example,
AddCols
according to Microsoft practice.
Purpose |
Java API |
C++ API |
C API |
---|---|---|---|
Accesses double-valued information about quality of solution |
IloCplex.getQuality |
IloCplex::getQuality |
|
Accesses integer-valued information about quality of solution |
IloCplex.getQuality |
IloCplex::getQuality |
|
Accesses objective coefficient sensitivity ranges |
IloCplex.getObjSA |
IloCplex::getObjSA |
|
Accesses RHS sensitivity ranges |
IloCplex.getRHSSA |
IloCplex::getRHSSA |
|
Accesses ranged row sensitivity ranges |
IloCplex.getRangeSA |
IloCplex::getRangeSA |
---- |
Accesses bound sensitivity ranges |
IloCplex.getBoundSA |
IloCplex::getBoundSA |
|
Accesses coefficient change sensitivity data |
---- |
---- |
|
Invokes FeasOpt, which accepts weighted sum of preferences; then suggests modifications of bounds of variables or ranges of constraints to achieve feasibility |
IloCplex.feasOpt |
IloCplex::feasOpt |
|
Invokes the conflict refiner, which accepts an infeasible problem then suggests minimal set of conflicting bounds and constraints to relax to make the infeasible problem feasible. |
IloCplex.refineConflict |
IloCplex::refineConflict |
|
Accesses results from the conflict refiner. |
IloCplex.getConflict |
IloCplex::getConflict |