[Coin-lpsolver] quadratic programming help

[François Galea]

Thank you for the help !

I have managed to find sample QPS files on the web, thanks to the 
information you provided. clp's barrier method seems to behave perfectly 
with those problems.

François

John J Forrest a écrit :
> 
> François,
> 
> Help!  Quadratic is still very much beta - interior point being more 
> robust.  How much interest is there in Quadratic for Clp.  It sort of 
> works but I would need to go back to it and send a considerable amount 
> of time to get it in a really good state.  As I said,  at present 
> interior point is not too bad.  Dual simplex does not exist and really 
> primal simplex is a trial version of primal with a  nonlinear objective 
> so can be slow.
> 
> I can do documentation if there is interest, but some people may have 
> realized that that is not my strong point.  There is a bit of code in 
> Test/unitTest.cpp and since Tuesday testQP.cpp in Samples.
> 
> As to the second point the stand-alone clp can do quadratic if the mps 
> files are in QUADOBJ format i.e. QUADOBJ then objective before ENDATA.
> 
> John Forrest
> 
> 
> *François Galea <francois.galea at prism.uvsq.fr>*
> Sent by: coin-lpsolver-bounces at list.coin-or.org
> 
> 01/27/2005 07:30 AM
> 
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> 	[Coin-lpsolver] quadratic programming help
> 
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> 
> 
> 
> 
> Hi,
> 
> Is there any documentation available for solving quadratic problems with
> CLP ?
> 
> Is the use of the API necessary, or can the clp standalone program read
> and solve QPs ?
> 
> Thanks in advance for your help.
> 
> François Galea.
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