Re: [Help-glpk] Binary variables in glpk

[Ali Baharev]

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:
>
>
>
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> 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:
>
>
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> LPX_FR −1 < x < +1 Free (unbounded) variable
>
> LPX_LO lb _ x < +1 Variable with lower bound
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> LPX_UP −1 < x _ ub Variable with upper bound
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> LPX_DB lb _ x _ ub Double-bounded variable
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> LPX_FX lb = x = ub Fixed variable
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> 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.
>
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>
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