Analyzing Solutions in the CPLEX Callable Library (C API)

These routines enable your application to analyze solutions produced by CPLEX.

CPXXboundsa and CPXboundsa
The routine CPXXboundsa/CPXboundsa accesses upper and lower sensitivity ranges for lower and upper variable bounds for a specified range of variable indices.
CPXXclpwrite and CPXclpwrite
After CPXXrefineconflict/CPXrefineconflict or CPXXrefineconflictext/CPXrefineconflictext has been invoked on an infeasible problem to identify a minimal set of constraints that are in conflict, this routine will write an LP format file containing the identified conflict.
CPXXfeasopt and CPXfeasopt
The routine CPXXfeasopt/CPXfeasopt computes a minimum-cost relaxation of the righthand side values of constraints or bounds on variables in order to make an infeasible problem feasible.
CPXXfeasoptext and CPXfeasoptext
The routine CPXXfeasoptext/CPXfeasoptext extends CPXXfeasopt/CPXfeasopt in several ways.
CPXXgetconflict and CPXgetconflict
This routine returns the linear constraints and variables belonging to a conflict previously computed by the routine CPXXrefineconflict/CPXrefineconflict.
CPXXgetconflictext and CPXgetconflictext
For an infeasible problem, if the infeasibility has been analyzed by CPXXrefineconflictext/CPXrefineconflictext, this routine accesses information about the conflict computed by it.
CPXXgetdblquality and CPXgetdblquality
The routine CPXXgetdblquality/CPXgetdblquality accesses double-valued information about the quality of the current solution of a problem.
CPXXgetgrad and CPXgetgrad
The routine CPXXgetgrad/CPXgetgrad can be used, after an LP has been solved and a basis is available, to access information useful for different types of post-solution analysis.
CPXXgetintquality and CPXgetintquality
The routine CPXXgetintquality/CPXgetintquality accesses integer-valued information about the quality of the current solution of a problem.
CPXXgetsolnpooldblquality and CPXgetsolnpooldblquality
The routine CPXXgetsolnpooldblquality/CPXgetsolnpooldblquality accesses double-valued information about the quality of a solution in the solution pool.
CPXXgetsolnpoolintquality and CPXgetsolnpoolintquality
The routine CPXXgetsolnpoolintquality/CPXgetsolnpoolintquality accesses integer-valued information about the quality of a solution in the solution pool.
CPXXobjsa and CPXobjsa
The routine CPXXobjsa/CPXobjsa accesses upper and lower sensitivity ranges for objective function coefficients for a specified range of variable indices.
CPXXqpindefcertificate and CPXqpindefcertificate
The routine CPXXqpindefcertificate/CPXqpindefcertificate computes a vector x that satisfies the inequality x'Qx < 0.
CPXXrefineconflict and CPXrefineconflict
The routine CPXXrefineconflict/CPXrefineconflict identifies a minimal conflict for the infeasibility of the linear constraints and the variable bounds in the current problem.
CPXXrefineconflictext and CPXrefineconflictext
The routine CPXXrefineconflictext/CPXrefineconflictext extends CPXXrefineconflict/CPXrefineconflict to problems with indicator constraints, quadratic constraints (except for explicit second order cone constraints), special ordered sets (SOSs), or piecewise linear constraints and to situations where groups of constraints should be considered as a single constraint.
CPXXrefinemipstartconflict and CPXrefinemipstartconflict
The routine CPXXrefinemipstartconflict/CPXrefinemipstartconflict refines a conflict in order to determine why a given MIP start is not feasible.
CPXXrefinemipstartconflictext and CPXrefinemipstartconflictext
The routine CPXXrefinemipstartconflictext/CPXrefinemipstartconflictext refines a conflict of a model inferred from a MIP start, where a MIP start consists of pairs of variables and values and where the model may include quadratic constraints, indicator constraints, or special ordered sets, as well as linear constraints and bounds.
CPXXrhssa and CPXrhssa
The routine CPXXrhssa/CPXrhssa accesses upper and lower sensitivity ranges for righthand side values of a range of constraints.

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