> How do I tell GLPK by API to not use a few variables, lets say that > I dont want that the variables Y appear at the Minimize at the top of > the problem file. like this.
> *** OBJECTIVE FUNCTION *** > Minimize: OBJF > 7 x[0,1] > 12 x[0,2] > 17 x[0,3] > 7 x[0,4] > 5 x[1,1] > 9 x[1,2] > 14 x[1,3] > 7 x[1,4] > 3 x[2,1] > 7 x[2,2] > 12 x[2,3] > 8 x[2,4] > 2 x[3,1] > 5 x[3,2] > 10 x[3,3] > 9 x[3,4] > 1 Y1 > -1 Y2 > 1 Y3 > -1 Y4 > *** ROWS (CONSTRAINTS) *** > Row 1: APPLE1 = 1 > 7 x[0,4] > 17 x[0,3] > 12 x[0,2] > 7 x[0,1] > This is part of the output fo glpk when I use the function > lpx_print_prob(lp); > And the variables Y that appear at Minimize I do not want them to > appear there. Is there a way? Y's appear in the objective function because you specified non-zero objective coefficients for them. To change objective coefficients use the api routine glp_set_obj_coef. For more details please see the reference manual. BTW, you could use glp_write_lp(lp, NULL, "filename") rather than lpx_print_prob; its output is more readable. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
