CPLEX cpxcb MIPPROBE
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This page is part of the CPLEX Manual. See CPLEX. |
CPLEX MIP Probe and Clique Merging callback.
Called from TOMLAB /CPLEX during MIP Probing and Clique Merging.
This callback is enabled by setting callback(8) = 1 in the call to cplex.m, or P rob.M I P.callback(8) = 1 if using tomRun('cplex',...).
cpxcb MIPPROBE is called with one argument, the cpxCBInfo progress information vector.
Contents of cpxCBInfo variable:
i cpxCBInfo(i) - Value ------------------------------------------------------------- 1 BEST_INTEGER - obj. value of best integer solution 2 BEST_REMAINING - obj. value of best remaining node 3 NODE_COUNT - total number of nodes solved 4 NODES_LEFT - number of remaining nodes 5 MIP_ITERATIONS - total number of MIP iterations 6 MIP_FEAS - returns 1 if feasible solution exists; otherwise, 0 7 CUTOFF - updated cutoff value 8 CLIQUE_COUNT - number of clique cuts added 9 COVER_COUNT - number of cover cuts added 10 DISJCUT_COUNT - number of disjunctive cuts added 11 FLOWCOVER_COUNT - number of flow cover cuts added 12 FLOWPATH_COUNT - number of flow path cuts added 13 FRACCUT_COUNT - number of Gomory fractional cuts added 14 GUBCOVER_COUNT - number of GUB cover cuts added 15 IMPLBD_COUNT - number of implied bound cuts added 16 MIRCUT_COUNT - number of mixed integer rounding cuts added 17 PROBE_PHASE - current phase of probing (0-3) 18 PROBE_PROGRESS - fraction of probing phase completed (0.0-1.0) 19 FRACCUT_PROGRESS - fraction of Gomory cut generation for the pass completed (0.0 - 1.0) 20 DISJCUT_PROGRESS - fraction of disjunctive cut generation for the pass completed (0.0 - 1.0) 21 FLOWMIR_PROGRESS - fraction of flow cover and MIR cut generation for the pass completed (0.0 - 1.0) 22 MY_THREAD_NUM - identifier of the parallel thread making this call (always 0) 23 USER_THREADS - total number of parallel threads currently running (always 1)
By returning a nonzero value from cpxcb MIPPROBE, the user can terminate the optimization.
If modifying this file, it is recommended to make a copy of it which is placed before the original file in the MATLAB path.
