<div dir="ltr">Thank you Kashif, I've been getting the same reply from everyone and will try it out.<div><br></div><div style>Regards,</div><div style>Adel</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Mon, Feb 18, 2013 at 4:07 PM, Kashif Rashid <span dir="ltr"><<a href="mailto:krashid@slb.com" target="_blank">krashid@slb.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Adel,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Most optimizers are designed to minimize an objective function.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">To maximize, you can simply multiply the objective function by -1.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">If there is a flag in Bonmin to achieve this it will do the same thing.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Incidentally, it will not be the obj_scaling_factor.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Regards, Kashif<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:bonmin-bounces@list.coin-or.org" target="_blank">bonmin-bounces@list.coin-or.org</a> [mailto:<a href="mailto:bonmin-bounces@list.coin-or.org" target="_blank">bonmin-bounces@list.coin-or.org</a>]
<b>On Behalf Of </b>Adel Boseli<br>
<b>Sent:</b> Sunday, February 17, 2013 6:05 PM</span></p><div class="im"><br>
<b>To:</b> <a href="mailto:bonmin@list.coin-or.org" target="_blank">bonmin@list.coin-or.org</a><br>
<b>Subject:</b> [Bonmin] Maximizing an Objective Function<u></u><u></u></div><p></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hello everyone, <u></u><u></u></p><div><div class="h5">
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Can someone tell me how to use bonmin to maximize an objective function instead of minimize?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Some readings point to an option in IPOPT called <span style="font-size:8.5pt;font-family:"Courier New"">obj</span><span style="font-size:8.5pt;font-family:"Courier New";color:#999999">_</span><span style="font-size:8.5pt;font-family:"Courier New"">scaling</span><span style="font-size:8.5pt;font-family:"Courier New";color:#999999">_</span><span style="font-size:8.5pt;font-family:"Courier New"">factor, </span>is
there something similar in Bonmin or can I set an IPOPT option for bonmin to use?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Thanks n advance...<u></u><u></u></p>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><div><br></div><div>Adel Boseli </div><div><span style="color:rgb(80,0,80)">Co-founder and Managing Partner</span></div><div><img width="140px" height="70px" src="http://shekra.com/ShekraLogo.jpg" alt="home" style="color:rgb(0,0,0);font-family:'Times New Roman';font-size:medium"><span style="color:rgb(0,0,0);font-family:'Times New Roman';font-size:medium"> </span><br style="color:rgb(0,0,0);font-family:'Times New Roman';font-size:medium">
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