[Couenne] Changing on Couenne code to save information

[Wendel Melo]

Thank you, Pietro!!!!

I will try see that!


2013/10/19 Pietro Belotti <petr.7b6 at gmail.com>

> Wendel,
>
> I think a good place is Couenne/src/convex/generateCuts.cpp, at the
> beginning of CouenneCutGenerator::generateCuts(). This function is called
> more or less at every node. You can get the total CPU time spent so far
> with CoinCpuTime(), and lower and upper bound with si.getColLower ()
> [indObj] and problem_ -> getCutOff (), respectively (indObj is declared at
> the beginning).
>
> Regards,
> Pietro
>
>
>
> On Fri, Oct 18, 2013 at 10:56 PM, Wendel Melo <wendelalexandre at gmail.com>wrote:
>
>> Thank you Stefan and Pietro!
>>
>> Taking advantage, Pietro, do you know where I could change the Couenne
>> code to save that information in a external txt file? I have lot of
>> problems to test and it would be very painful check output for all cases
>>
>> Thank you again
>>
>> Wendel
>>
>>
>> 2013/10/17 Pietro Belotti <petr.7b6 at gmail.com>
>>
>>> Wendel,
>>>
>>> in alternative you can set the option
>>>
>>> bb_log_interval 10
>>>
>>>  (or an even smaller number than 10) in the option file couenne.opt.
>>> This will increase by far the amount of output, but Couenne will print a
>>> line every 10 nodes with information on the lower bound and the total CPU
>>> time so far. You can then select those lines with times around multiples of
>>> 1800.
>>>
>>> Pietro
>>>
>>>
>>> On Thu, Oct 17, 2013 at 3:10 PM, Stefan Vigerske <
>>> stefan at math.hu-berlin.de> wrote:
>>>
>>>> Hi,
>>>>
>>>> I'm adding a primal heuristic to Couenne in order to track such
>>>> information.
>>>>
>>>> CouenneSetup couenne_setup;
>>>> couenne_setup.heuristics().**push_back(BabSetupBase::**
>>>> HeuristicMethod());
>>>> couenne_setup.heuristics().**back().heuristic = new
>>>> GamsCbcHeurSolveTrace(...);
>>>> couenne_setup.heuristics().**back().id = "Solvetrace writing
>>>> heuristic";
>>>>
>>>> https://projects.coin-or.org/**GAMSlinks/browser/trunk/**GAMSlinks/src/
>>>> **SolverInterfaces/**GamsCbcHeurSolveTrace.hpp<https://projects.coin-or.org/GAMSlinks/browser/trunk/GAMSlinks/src/SolverInterfaces/GamsCbcHeurSolveTrace.hpp>
>>>>
>>>> Stefan
>>>>
>>>>
>>>> On 10/16/2013 11:18 PM, Wendel Melo wrote:
>>>>
>>>>> Hi experts
>>>>>
>>>>> I am a new couenne user. I have used Couenne to solve a kind of
>>>>> nonconvex
>>>>> quadratic problems. However, I would like to save information about
>>>>> Couenne
>>>>> progress in a file after a certain measure of time, since I am doing a
>>>>> comparative research. For example, I would like to save lower bound and
>>>>> upper bound of a input problem after each 30 minutes of cpu time.
>>>>>
>>>>> I know it would require a change on Couenne code. Does anyone here have
>>>>> some idea where I could do those changes in the Couenne code?
>>>>>
>>>>> Thanks in advanced
>>>>>
>>>>>
>>>>> Wendel Melo
>>>>> Ph. D. Student
>>>>> University of Michigan / Federal University of Rio de Janeiro
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ______________________________**_________________
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>>>>> Couenne at list.coin-or.org
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>>>>>
>>>>>
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>>>>
>>>
>>>
>>
>>
>> --
>> Wendel
>>
>
>


-- 
Wendel
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