Re: [Help-glpk] What is the utility of glp_smcp?

[Andrew Makhorin]

> How change parameters SCALE and USECUTS?

> I must give as value 0

To automatically scale the problem you need to call lpx_scale_prob
before a call to glp_adv_basis (if needed) and glp_simplex.

Cuts are used by glp_intopt, not by glp_simplex. There is a similar
structure, glp_iocp, which is the control parameter list passed to
glp_intopt.

> And how affect the value 0 at PRESOLVE?
> for example, glp_smcp->presolve=GLP_OFF

Set parm.presolve = GLP_OFF (btw, it is default value), where parm is
a variable of glp_smcp type, i.e. the control parameter list.

Note that before any changes the parameter list should be initialized
with glp_smcp_init(&parm).