Cool! Clumsy is ok for my needs right now. I'll give it a try.<br><br>You mean there will be no offset? I.e., what if presolve fixes a variable to 1.0 and removes it, and it has nonzero cost? <br><br><div class="gmail_quote">
<br><br><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><font face="sans-serif" size="2">Matt,</font>
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<br><font face="sans-serif" size="2">This is a clumsy Cbc type reply.</font>
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<br><font face="sans-serif" size="2">cbc xxxxx.mps -preprocess save -heuristic
off -maxnode -1 -solve</font>
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<br><font face="sans-serif" size="2">will save cbc-presolved model on presolved.mps</font>
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<br><font face="sans-serif" size="2">The -heuristic off and -maxnode -1are
there to make it stop as quickly as possible. </font>
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<br><font face="sans-serif" size="2">The offset should be fine.</font>
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<br><font face="sans-serif" size="2">John</font>
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<td width="100%"><font face="sans-serif" size="2"><b>[Coin-discuss] presolve
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<td><font color="#e26200" face="sans-serif" size="2"><b>Matthew Galati </b></font>
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<div align="right"><font face="sans-serif" size="1">09/24/2009 02:34 PM</font></div></td></tr></tbody></table>
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<td><font color="#8f8f8f" face="sans-serif" size="2">Sent by:</font>
</td><td width="100%"><font color="#e26200" face="sans-serif" size="2"><b><a href="mailto:coin-discuss-bounces@list.coin-or.org" target="_blank">coin-discuss-bounces@list.coin-or.org</a></b></font></td></tr></tbody></table>
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<br><font size="3"><div><div class="h5">What is the simplest way to presolve an IP? I don't care
about doing it in memory or even having any way to "unravel/postprocess"
to get back to the original space.<br>
<br>
I simply want to:<br>
(1) read an MPS file<br>
(2) presolve it<br>
(3) output a new MPS file (and perhaps an objective offset, so that
I can check that I match up at end)<br>
<br>
Thanks,<br></div></div>
Matt</font><tt><font size="2">_______________________________________________<br>
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