[Cbc] How to decide with variable to branch ?

[John Forrest]

Haroldo,

Maybe you have to derive from CbcBranchDynamicDecision - anyway that 
works - see attached.

John Forrest

On 22/12/11 21:57, Haroldo Gambini Santos wrote:
> Hi Forrest,
>
> Put a printf inside betterBranch  and  bestBranch  in my class derived
> from CbcBranchDecision   and   set   cbcMode->setBranching method for an
> object of this class but after solving (many nodes processes) it appears
> that this was never called since I got no output from the expected
> messages. What I am missing ?
>
>
> On 21-12-2011 06:20, John Forrest wrote:
>> Haroldo,
>>
>>
>> You want betterBranch.  bestBranch was older and is only called if 
>> there are no dynamic pseudo costs etc etc.
>>
>> You may also want to derive from CbcSimpleIntegerDynamicPseudoCost to 
>> give yourself even more control.
>>
>> John
>>
>> On 20/12/11 19:06, Haroldo Gambini Santos wrote:
>>> Dear All,
>>>
>>> I would like to insert a code in my solver (built using cbc) to 
>>> decide which variable to branch and the direction.
>>>
>>> What should I do ? Write a callback ? To specialize some class ?
>>>
>>> Tried to create a class derived from
>>> CbcBranchDecision, override the method  bestBranch  and call 
>>> cbcModel->cbcBranchingMethod for this class but apparently this 
>>> method was not even called (put a printf inside to check).
>>>
>>> Regards,
>>>
>>> Haroldo
>>>
>>>
>>> _______________________________________________
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>>>
>>>
>>
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>
>

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