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## Re: [Help-glpk] Binary variables in glpk

**From**: |
Ali Baharev |

**Subject**: |
Re: [Help-glpk] Binary variables in glpk |

**Date**: |
Sat, 15 Sep 2007 18:24:39 +0200 |

If i am not mistaken, the function you are looking for is
glp_set_col_kind(glp_prob* mip, int j, int kind)
where kind is GLP_BV. It is discussed in section Mixed integer
programming routines.
Do you have to use the C API? Using Mathprog could be easier.
Good luck,
Ali
On 9/15/07, Nicholas Patsourakis <address@hidden> wrote:
>
>
>
>
>* I am newbie in glpk and I want to solve an lp problem with binary decision*
>* variables, that is zero (0) or one (1). How can I declare that in glpk? In*
>* the manual I found these:*
>
>
>
>* LPX_FR −1 < x < +1 Free (unbounded) variable*
>
>* LPX_LO lb _ x < +1 Variable with lower bound*
>
>* LPX_UP −1 < x _ ub Variable with upper bound*
>
>* LPX_DB lb _ x _ ub Double-bounded variable*
>
>* LPX_FX lb = x = ub Fixed variable*
>
>
>
>* But I none of the above can declare my binary decision variables (lpx set*
>* col bnds). Can anyone help? I am sure that there must be an answer but I*
>* cant find it.*
>
>
>
>
>* _______________________________________________*
>* Help-glpk mailing list*
>* address@hidden*
>* http://lists.gnu.org/mailman/listinfo/help-glpk*
>
>