How to print the evolution of mipgap through iterations?

[boiro9]

Is there any option to print the evolution of mipgap through the iterations in the output while CBC is running?
I have tried the following options:
{'ratio': 1, 'slog': 3}
and it prints now many information but the gap is not included throught the iterarions, I can only see the final gap of the solution.

[jjhforrest]

Why do you want this? You get a feel for how the gap is changing just from the normal output e.g. Cbc0010I After 1000 nodes, 9 on tree, 7350 best solution, best possible 6848.5558 (3.88 seconds) and a gap of approximately 7% If you want to stop when the gap drops beow 7% then you can set -ratiogap 0.07 Otherwise choose an example e.g. interrupt.cpp and modify the event handler to something like    } else if (whichEvent == treeStatus) {       if (model_->bestSolution()) {     double bestPossible = model_->getBestPossibleObjValue();     double bestObjective = model_->getObjValue();     printf("Gap %g\n",(bestObjective-bestPossible)/fabs(bestPossible));       } else {     printf("No solution found yet\n");       }       return noAction; // carry on

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On 23/05/2022 12:46, Ángel Manuel González Rueda wrote: Is there any option to print the evolution of mipgap through the iterations in the output while CBC is running? I have tried the following options: {'ratio': 1, 'slog': 3} and it prints now many information but the gap is not included throught the iterarions, I can only see the final gap of the solution. — Reply to this email directly, view it on GitHub <#505>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABWJYHA3OX5DPFJURCGZ2XDVLNVX3ANCNFSM5WVR57XQ>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>