<br><font size=2 face="sans-serif">I had good luck with setting hint parameters,
like:</font>
<br>
<br><font size=2 face="sans-serif">
osi->setHintParam(OsiDoPresolveInInitial,true);</font>
<br><font size=2 face="sans-serif">
osi->setHintParam(OsiDoScale,true);</font>
<br><font size=2 face="sans-serif">
osi->setHintParam(OsiDoCrash,true);</font>
<br>
<br><font size=2 face="sans-serif">You can see more possibilities in OsiSolverParameters.hpp.</font>
<br>
<br><font size=2 face="sans-serif">Alan</font>
<br><font size=2 face="sans-serif"><br>
Alan King<br>
Mathematical Sciences, IBM Research<br>
http://www.research.ibm.com/<br>
http://www.research.ibm.com/people/k/kingaj/<br>
<br>
University Relations: University of Washington<br>
http://www.washington.edu<br>
http://www.ibm.com/university</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>"David T" <intrepid__x@hotmail.com></b></font>
<br><font size=1 face="sans-serif">Sent by: coin-discuss-admin@www-124.southbury.usf.ibm.com</font>
<p><font size=1 face="sans-serif">01/12/2004 02:50 AM</font>
<br><font size=1 face="sans-serif">Please respond to coin-discuss</font>
<td><font size=1 face="Arial"> </font>
<br><font size=1 face="sans-serif"> To:
coin-discuss@www-124.southbury.usf.ibm.com</font>
<br><font size=1 face="sans-serif"> cc:
</font>
<br><font size=1 face="sans-serif"> Subject:
[Coin-discuss] COIN algorithm selection</font></table>
<br>
<br>
<br><font size=2><tt>Hello,<br>
<br>
My name is David Trainor, and I am conducting bioinformatics research at
the <br>
University of Waterloo.<br>
<br>
I am using COIN, and I have a question which *should* be trivial to answer.
<br>
I would be very grateful for any insights you can provide.<br>
<br>
Basically, I'm designing an application which must solve very large linear
<br>
programming problems. Depending on the problem instance, there will
be <br>
times when I will want to call each of the following algorithms:<br>
<br>
1. Primal Simplex algorithm<br>
2. Dual Simplex algorithm<br>
3. Interior Point algorithm (in IBM OSL, ekk_barrier and ekk_crossover)<br>
4. Something equivalent to ekk_eitherSimplex<br>
<br>
We are using COIN-OSI because we don't want to limit our software to any
<br>
particular simplex implementation. How do you suggest dealing with
this? <br>
initialSolve() seems too abstract, but I don't want to devote myself to
a <br>
particular LP package.<br>
<br>
Thank you in advance for your help.<br>
<br>
Best regards,<br>
<br>
Dave.<br>
<br>
_________________________________________________________________<br>
The new MSN 8: advanced junk mail protection and 2 months FREE* <br>
http://join.msn.com/?page=dept/bcomm&pgmarket=en-ca&RU=http%3a%2f%2fjoin.msn.com%2f%3fpage%3dmisc%2fspecialoffers%26pgmarket%3den-ca<br>
<br>
_______________________________________________<br>
Coin-discuss mailing list<br>
Coin-discuss@www-124.ibm.com<br>
http://www-124.ibm.com/developerworks/oss/mailman/listinfo/coin-discuss<br>
</tt></font>
<br>