[Coin-lpsolver] Constraint matrix

[Kyle Ellrott]

Thank you, that helps ;-)

But I do have one problem.  According the page mentioned, both 
ClpPlusMinusOneMatrix and ClpPackedMatrix both inherit from 
ClpMatrixBase.  The problem is that OsiClpSolverInterface's loadProblem 
only mentions CoinPackedMatrix (which I think is the same as 
ClpPackedMatrix), but not the parent class of ClpMatrixBase.  So when I 
try to pass a ClpPlusMinusOneMatrix to OsiClpSolverInterface's 
loadProblem, I get something like

intpro_threading.cc:766: error: no matching function for call to `
    OsiClpSolverInterface::loadProblem(ClpPlusMinusOneMatrix&, double*&,
    double*&, double*&, double*&, double*&)'
/Users/kye/COIN/include/OsiClpSolverInterface.hpp:600: error: 
candidates are:
    virtual void OsiClpSolverInterface::loadProblem(const 
CoinPackedMatrix&,
    const double*, const double*, const double*, const double*, const 
double*)

Any thoughts?

Kyle



> I think you will find this page of the CLP documentation will help you:
>
> http://www.coin-or.org/Clp/userguide/ch03s02.html
>
> In other words, there's (supposed to be) a matrix class specific to 
> your situation.
>
> At 02:38 PM 3/2/2005, Kyle Ellrott wrote:
>> I'm curious about the CoinPackedMatrix structure that I use to setup 
>> my constraint matrix for my integer programming problem.  From what I 
>> understand so far, it's input data is doubles.  But for my particular 
>> problem, the only values I put in it are -1, 1, and 0 (0 being being 
>> cells that aren't mentioned in my description).  By using a double 
>> rather then a char, I'm using 8 time more memory then I need to.
>> Is there are more efficient method to describe this matrix?
>>
>> Kyle
>>
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>