[Cbc] Question about CbcEventHandler

[Alexis Guigue]

Thanks for this answer. I will dig into this.

What is interesting is that in my main code, it does not seem to be the 
case, i.e.,

double *argmin = cbcModel.bestSolution();

where cbcModel is my main CbcModel object provides the ''full'' original
set of variables

On 2013-06-20 4:37 PM, Haroldo Santos wrote:
>
> Probably because the model is pre processed and some variables just 
> were removed.
>
> The originaLcolumns vector in the osi interface will give the 
> connection with the old variables.
>
> Cheers
>
> Em 20/06/2013 15:10, "Alexis Guigue" <aguigue at softree.com 
> <mailto:aguigue at softree.com>> escreveu:
>
>     Hi
>
>     I have reused the class CbcEventHandler in my code. I am facing
>     some issues trying to use the pointer model_.
>
>     In the function event, at the end of each node (i.e.
>     whichEvent==node), I need to retrieve:
>     - the  current best objective. I do it using
>     model_->getMinimizationObjValue(). This seems ok.
>     - the best possible objective. I do it using
>     model_->getBestPossibleObjValue(). This seems ok.
>     - the value of a particular variable, say "DUMMY". I have stored
>     the column index of "DUMMY"
>     when I created the model.  I want to get the value of this
>     variable for the best solution.
>     So I do, double *argmin = model_->bestSolution() and then
>     argmin[INDEXDUMMY].
>     It just does not work. I am sure about that, because in the
>     instance I have been testing,
>     it happens that I have the constraints DUMMY = 0 (DUMMY is a
>     continuous variable
>     by the way)
>
>     Any idea????
>
>     Thanks in advance
>
>     -- 
>     Alexis Guigue, E.I.T., B.Eng., M.A.Sc <http://M.A.Sc>., Ph.D.
>     Software Engineer/Research Engineer
>     aguigue at softree.com <mailto:aguigue at softree.com>
>     604-519-6222, ext. 3 <tel:604-519-6222%2C%20ext.%203>
>
>     Softree Technical Systems Inc.
>     Engineering an Easier Way
>     www.softree.com <http://www.softree.com>
>
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-- 
Alexis Guigue, E.I.T., B.Eng., M.A.Sc., Ph.D.
Software Engineer/Research Engineer
aguigue at softree.com
604-519-6222, ext. 3

Softree Technical Systems Inc.
Engineering an Easier Way
www.softree.com

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