<br><font size=2 face="sans-serif">Matt,</font>
<br>
<br><font size=2 face="sans-serif">I am confused by your notes. getBInvACol(numberColumns+i,..)
should get the ith artificial and should not throw an exception. The
coding at line 698 of Test/unitTest.cpp is an example.</font>
<br>
<br><font size=2 face="sans-serif">Partly on this topic, I am in the middle
of making changes to Clp so that repeated calls are faster and so that
the factorization is not deleted etc. These are designed to make
the CBC->OSI->CLP combination faster but may be useful in other contexts.
If anyone is brave enough to help me test these changes over the
next few months can they contact me and say what they would want and whether
they are using Clp via Osi or directly.</font>
<br>
<br><font size=2 face="sans-serif">John Forrest</font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>magh@lehigh.edu</b> </font>
<br><font size=1 face="sans-serif">Sent by: coin-lpsolver-bounces@list.coin-or.org</font>
<p><font size=1 face="sans-serif">12/03/2004 04:34 PM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td valign=top><font size=1 face="sans-serif">coin-lpsolver@list.coin-or.org</font>
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<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td valign=top><font size=1 face="sans-serif">Re: [Coin-lpsolver] tableau
column for artificials</font></table>
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<br></table>
<br>
<br>
<br><font size=2><tt>Sorry for posting to my own post (twice)... I often
find myself having<br>
conversations with myself through email. It keeps me entertained. :)<br>
<br>
Can't I just use getBInvCol(r, vec), where r is the row index of the artificial<br>
variable?<br>
<br>
Thanks,<br>
Matt<br>
<br>
<br>
> Sorry - I meant,<br>
> <br>
> "column of the tableau for an artificial (non-basic) variable"<br>
> <br>
> Thanks,<br>
> Matt<br>
> <br>
> <br>
> > Hi CLP,<br>
> > <br>
> > In getBInvARow, you return a structural and artificial section
from the<br>
> > tableau.<br>
> > Is it possible to get a column of the tableau for an artificial
(basic)<br>
> > variable? <br>
> > <br>
> > Currently, getBInvACol throws an error if you ask for any column
index ><br>
> > numberColumns().<br>
> > <br>
> > Thanks,<br>
> > Matt<br>
> > <br>
> > <br>
> > <br>
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> <br>
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