[Coin-lpsolver] Re: problems with BInvCol and BInvRow

[John J Forrest]

Anureet,

enableSimplexInterface was an attempt to allow the user to build their own 
simplex code.  So you can say what the incoming and outgoing variable are. 
 The primal and dual algorithms are so different that a flag to say which 
one is going to be tried was added as a parameter to 
enableSimplexInterface. 

Only the primal version was ever coded - and as you say doingPrimal must 
be set to true because as far as I know only Clp ever attempted to 
implement this.  So with dual you would get into 
OsiClpSolverInterface::dualPivotResult which aborts - deliberately.

John Forrest



Anureet Saxena <anureet at yahoo.com> 
Sent by: coin-lpsolver-bounces at list.coin-or.org
09/21/2005 01:56 PM

To
coin-lpsolver at list.coin-or.org, anureet at yahoo.com
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Subject
[Coin-lpsolver] Re: problems with BInvCol and BInvRow






thanks for answering my query on BInvCol and BInvRow functions.
 
I had one more question in my email, namely what is the role of the 
boolean parameter (named as doingPrimal) in the function 
OsiSimplexInterface::enableSimplexInterface?
 
I do not think this is documented anywhere. This parameter, however, needs 
to be set to true (if I correctly understand) in most typical cases.
 
regards,
Anureet Saxena,
 


Anureet Saxena
anureet at cmu.edu
anureet at yahoo.com

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