int GRBgettuneresult ( GRBmodel *model,
    int n )

Use this routine to retrieve the results of a previous GRBtunemodel call. Calling this routine with argument n causes tuned parameter set n to be copied into the model. Parameter sets are stored in order of decreasing quality, with parameter set 0 being the best. The number of available sets is stored in attribute TuneResultCount.

Once you have retrieved a tuning result, you can call GRBoptimize to use these parameter settings to optimize the model, or GRBwrite to write the changed parameters to a .prm file.

Please refer to the parameter tuning section for details on the tuning tool.

Return value:

A non-zero return value indicates that a problem occurred while retrieving a tuning result. Refer to the Error Code table for a list of possible return values. Details on the error can be obtained by calling GRBgeterrormsg.


model: A model that has previously been used as the argument of GRBtunemodel.

n: The index of the tuning result to retrieve. The best result is available as index 0. The number of stored results is available in attribute TuneResultCount.

Example usage:

  error = GRBtunemodel(model);
  if (error) goto QUIT;

  error = GRBgetintattr(model, "TuneResultCount", &nresults);
  if (error) goto QUIT;

  if (nresults > 0) {
    error = GRBgettuneresult(model, 0);
    if (error) goto QUIT;