<div dir="ltr"><div>Just to make sure that I solved this Problem.</div><div>By some ridiculous mistake, I did specify not enough </div><div>iterations in my Interface to Clp. Sorry, for bothering,</div><div>with a little bit more patience I would have found that</div>
<div>without contacting the community.</div><div><br></div><div>Unortunately, compared with some other LP methods</div><div>is my current Interface to Clp's primal and dual Simplex</div><div>algorithm a Little bit slow. But that may have to do with</div>
<div>the Default factorization (which I think is dense). I will</div><div>enhance my Interface with some additional sparse factorizations.</div><div><br></div><div>There are quite a number of methods set up, mostly by Tim Davis,</div>
<div>(has moved from Florida to Texas A&M)?</div><div>Could anybody point me to one or two of the "best"? </div><div><br></div><div>Wolfgang in Heidelberg</div><div><br></div><div><br></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Wed, Jul 30, 2014 at 9:44 AM, Wolfgang Hartmann <span dir="ltr"><<a href="mailto:cmat.wolfgang@gmail.com" target="_blank">cmat.wolfgang@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div class="gmail_extra">Hi,</div><div class="gmail_extra">I'm using the C Interface for Clp!! </div><div class="gmail_extra"><br></div><div class="gmail_extra">that means I'm calling (among others):</div>
<div class="gmail_extra"> - irc = Clp_readMps(model,ofil,1,0);<br></div><div class="gmail_extra"> - one of the following four:</div><div class="gmail_extra"> irc = Clp_dual(model,ifValuesPass);<br> irc = Clp_initialDualSolve(model);<br>
irc = Clp_primal(model,ifValuesPass);<br> irc = Clp_initialPrimalSolve(model);<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">For larger Problems, however, the Solutions I get are infeasible.</div>
<div class="gmail_extra">With any of the methods above!</div><div class="gmail_extra"><br></div><div class="gmail_extra">I had a look at the C++ examples and thought maybe running something like</div><div class="gmail_extra">
Presolved.Info.presolvedModel(model)</div><div class="gmail_extra">would help getting some more reasonable result.</div><div class="gmail_extra"><br></div><div class="gmail_extra">However, I did not find something similar in the C Interface source code</div>
<div class="gmail_extra">distributed with Clp. Is it just me or is there anybody else of you who works </div><div class="gmail_extra">with that C Interface? How do you call </div><div class="gmail_extra"> Presolved.Info.presolvedModel(model)</div>
<div class="gmail_extra">using the C Interface??</div><div class="gmail_extra"><br></div><div class="gmail_extra">Thanks,</div><div class="gmail_extra">Wolfgang</div><span class="HOEnZb"><font color="#888888"><div class="gmail_extra">
<br></div><div class="gmail_extra">
<br>-- <br></div><div class="gmail_extra" dir="ltr"><div>Time is not Onedimensional!</div><div>And even if it were - it would still be too difficult for me to handle.---<br></div><div>Wolfgang M. Hartmann</div><div><br></div>
</div><div class="gmail_extra">
</div></font></span></div>
</blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr"><div>Time is not Onedimensional!</div><div>And even if it were - it would still be too difficult for me to handle.---<br></div><div>Wolfgang M. Hartmann</div>
<div><br></div><div>On YouTube: <a href="http://www.youtube.com/watch?v=HE16lQWprwg&feature=youtu.be" style="color:rgb(17,85,204)" target="_blank">http://www.youtube.com/watch?v=HE16lQWprwg&feature=youtu.be</a></div>
<div> <a href="http://www.wcmat.com/wolfgang" target="_blank">www.wcmat.com/wolfgang</a> </div></div>
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