CPLEX cpxcb DUALCROSS

This page is part of the CPLEX Manual. See CPLEX.

CPLEX Dual crossover callback.

Called from TOMLAB /CPLEX during the dual crossover algorithm.

This callback is enabled by setting callback(4) = 1 in the call to cplex.m, or P rob.M I P.callback(4) = 1 if using tomRun('cplex',...).

cpxcb DUALCROSS is called with one argument, the cpxCBInfo progress information vector. Contents of cpxCBInfo vector:

i	cpxCBInfo(i)	 - Value
-------------------------------------------------------------
1	PRIMAL_OBJ	 - primal objective value
2	DUAL_OBJ	 - dual objective  value
3	PRIMAL_INFMEAS	 - measure of primal infeasibility
4	DUAL_INFMEAS	 - measure of dual infeasibility
5	PRIMAL_FEAS	 - 1 if primal feasible,  0 if not
6	DUAL_FEAS	 - 1 if dual feasible, 0 if not
7	ITCOUNT	         - iteration count
8	CROSSOVER_PPUSH  - primal push crossover itn. count
9	CROSSOVER_PEXCH  - primal exchange crossover itn. count
10	CROSSOVER_DPUSH  - dual push crossover itn. count
11	CROSSOVER_DEXCH  - dual exchange crossover itn. count

By returning a nonzero value from cpxcb DUALCROSS, 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.