[Cbc] Variables Names and Preprocess

[John J Forrest]

1) Setting CbcModel::setSpecialOptions(32|specialOptions()) should make
CbcModel keep names.  Not sure if it still works.

2)  If you do preprocessing outside CbcModel::branchAndBound and pass in
CglPreProcess xxxxxx into MyHeuristic before adding MyHeuristic to CbcModel
then you can use xxxxxx.originalColumns() to see which ones were kept.  You
could also access xxxxxx.originalModel() to get at names, which may be a
cleaner method than 1).

John Forrest


                                                                                                                         
  From:       Robinson <robmnk at gmail.com>                                                                                
                                                                                                                         
  To:         cbc at list.coin-or.org                                                                                       
                                                                                                                         
  Date:       03/20/2009 04:11 PM                                                                                        
                                                                                                                         
  Subject:    [Cbc] Variables Names and Preprocess                                                                       
                                                                                                                         





Hello everyone!
I'm having some troubles (2 in fact) and I hope someone could guide me.

1) Suppose I've created a class MyHeuristic extended from CbcHeuristic.
Now, would I be able to recover the variables names from inside
MyHeuristic::solution(...) method? I've wrote my code based on
driver4.cpp.  Even setting osidiscipline to 2 it won't work. It prints the
default names only (from solution(...) method).

2) There is a way(inside Cbc) to know which columns were dropped after the
preprocess?

Thanks!

--

robinson minali nakamura_______________________________________________
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