[Coin-discuss] Quick method to build an ILP model

[John J Forrest]

Salvatore,

The class CoinModel is designed to make it reasonably fast to add rows one 
at a time.  Try defining a CoinModel, building your model and then create 
an OsiSolverInterface object  by loadFromCoinModel.

Personally I would use Cbc and OsiClp rather than OsiCbc as that way you 
get more flexibility.  If I could remember who asked me to add 
OsiCbcSolverInterface I would stick pins in a little wax doll of him or 
her :-) 

John Forrest



"Salvatore Nocella" <salvatore.nocella at di.univaq.it> 
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10/13/2005 10:26 AM
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[Coin-discuss] Quick method to build an ILP model






Hello,

i'am writing a simple application to build an ILP model to be following
solved by BranchAndBound. My ILP is introduced iteratively calling the
method addRow() on a OsiCbcSolverInterface object instance. However this
procedure seems to be too much time consuming (mostly depending on the
addRow() computing time). I wonder if there is an alternative method to
introduce an ILP formulation row-by-row quicker than the previous.

Thanks! bye

_________________________________________________
Salvatore Nocella

Ph-D Student in Computer Science
Dipartimento di Informatica : Universita' di L'Aquila : Italy
office phone & fax + 39 0862 433736
web http://www.di.univaq.it/people/SalvatoreNocella/ 
laboratorio O.I.L. http://www.oil.di.univaq.it/ 
 


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