[Scip] Which heuristic sould solution?

Gerald Gamrath gamrath at zib.de
Sun Mar 24 14:37:13 MET 2013


Hi Ina,

the "*" means that the solution came from the LP, i.e., the LP solution 
fulfilled the integrality restrictions. In the primal heuristics 
statistics, this is listed in the first row.

Best,
Gerald

Am 24.03.2013 14:20, schrieb Liffey1986 at gmx.de:
> Thanks a lot for your help. This is exactly what I needed to know.
> One more question:
> What does the "*" mean? I can't find it in "display heuristics". Does 
> it mean that a new solution was found during the B&B-process?
> Best,
> Ina
> *Gesendet:* Sonntag, 24. März 2013 um 13:44 Uhr
> *Von:* "Gerald Gamrath" <gamrath at zib.de>
> *An:* Liffey1986 at gmx.de
> *Cc:* scip at zib.de
> *Betreff:* Re: [Scip] Which heuristic sould solution?
> Hi Ina,
>
> the number of solutions that is printed in the end it the total number 
> of solutions found, while you only get a line indicating that a new 
> solution was found if this solution is the new incumbent.
>
> But you can display the statistics via "display statistics" in the 
> interactive shell or calling SCIPprintStatistics() for the callable 
> library. In these statistics, there is a section about heuristics, 
> where you see for each heuristic how often it was called, how many 
> solutions if found and how much time was spent in it.
>
> Best,
> Gerald
>
> Am 24.03.2013 12:53, schrieb Liffey1986 at gmx.de:
>
>     I have a question about the SCIP output:
>     When SCIP finishes its optimization process, it gives information
>     about how many solution were found.
>     But when it says that e.g. 6 solution were found, I often can't
>     find 6 lines in the output with information on which heuristic
>     found these solution. If I find this information for only 4 of the
>     solution, how do I know how the others were found?
>     Best regards,
>     Ina
>
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