CPLEX cpxcb QPSIMPLEX

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

CPLEX Quadratic Simplex callback.

Called from TOMLAB /CPLEX when solving quadratic problems using the simplex algorithm.

This callback is enabled by setting callback(13) = 1 in the call to cplex.m, or Prob.M I P.callback(13) = 1 if using tomRun('cplex',...).

cpxcb QPSIMPLEX 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 QPSIMPLEX, 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.