[Dip] solveRelaxed Method

[Kipp Martin]

Hi Matt:

> That is correct. The user also is responsible to setBlockId after creating the variable with var->setBlockId( ). 
> For some reason (I forget), that is not part of the constructor, so it has to be set afterwards.

Yes, I am setting that. In my code I have

var->setBlockId( whichBlock);

where whichBlock is the argument in

DecompSolverStatus OSDipApp::solveRelaxed(const int whichBlock,
		const double * redCostX, const double convexDual,
		list<DecompVar*> & vars)

This is the correct setting, right?

Thanks

> 
> I can probably make a version of DecompVar that just needs solInd/solEls - since the framework can deduce the rest 
> with a little work - which reduce the burden on the user.
> 
> I plan to do that, when I have some free time, under this ticket:
>    https://projects.coin-or.org/Dip/ticket/50
> 
>> -----Original Message-----
>> From: dip-bounces at list.coin-or.org [mailto:dip-bounces at list.coin-or.org]
>> On Behalf Of Kipp Martin
>> Sent: Thursday, September 09, 2010 5:56 AM
>> To: dip at list.coin-or.org
>> Subject: [Dip] solveRelaxed Method
>>
>> Hi:
>>
>> In the solveRelaxed() method one adds a Decomp var using the constructor:
>>
>> DecompVar(solInd, solEls, varRedCost - convexDual, varOrigCost);
>>
>> based on examining example code it seems like:
>>
>> 1.) varRedCost should be the optimal objective function value of the
>> subproblem corresponding to whichBlock using the cost vector redCostX for
>> objective function coefficients, and
>>
>> 2.) varOrigCost should be the value you get by taking the optimal solution to
>> the subproblem corresponding to whichBlock using the cost vector redCostX
>> for objective function coefficients but then evaluating the objective
>> function based on the original cost vector.
>>
>> Is this correct?
>>
>> Thanks
>>
>>
>>
>> --
>> Kipp Martin
>> Professor of Operations Research
>> and Computing Technology
>> Booth School of Business
>> University of Chicago
>> 5807 South Woodlawn Avenue
>> Chicago, IL 60637
>> 773-702-7456
>> kmartin at chicagobooth.edu
>> http://www.chicagobooth.edu/faculty/bio.aspx?person_id=12825325568
>> http://projects.coin-or.org/OS
>>
>> _______________________________________________
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> 


-- 
Kipp Martin
Professor of Operations Research
and Computing Technology
Booth School of Business
University of Chicago
5807 South Woodlawn Avenue
Chicago, IL 60637
773-702-7456
kmartin at chicagobooth.edu
http://www.chicagobooth.edu/faculty/bio.aspx?person_id=12825325568
http://projects.coin-or.org/OS