[Coin-lpsolver] Packed Matrix to CbcModel

[Kyle Ellrott]

Yeah, looking at the way the data goes, this stems from the fact that  
the original ClpModel prototype doesn't have an 'assign' method.   
Rather it only has 'loadProblem' methods.  I can't see any way to get  
a packed matrix description into the ClpModel (or ClpSimplex) method  
without duplicating the data.

Is there another way I should try?


Kyle


Lou Wrote:

> Kyle,
>
> 	I can speak to the assignSolver question; I'll let John tackle the
> assignProblem issue (the answer may well be specific to clp).

Kyle Wrote:

>
>>
>> As I understand it, the next problem is that  
>> OsiClpSolverInterface::assignProblem takes a CoinPackedMatrix,  
>> passes it to OsiClpSolverInterface::loadProblem (which uses it to  
>> create a ClpSimplex object), and then deletes the originals.  This  
>> is my main concern, because this action causes a duplication event  
>> on the matrix, and the row/column boundaries and objective  
>> function,so for a period of time, the program has two copies of  
>> the data in memory.
>>
>> Is there any way that I can go from a packed matrix description to  
>> a CbcModel without ever duplicating the data?
>>
>>
>