Thank you both for your help.<br>I linearized the objective function using Charnes/Cooper. <br>Then got the writeLP (which gives me what I was expecting from constraint.display) to work and confirmed my data wasn't loading, so changed the indexing from (Input) to (S,I) to load it right.<br>
Then I saw the model was unbounded, reviewed it and realized that when I earlier linearized the constraints I inadvertently flipped the sign of the inequalities.<br>When the problem was unbounded the exe crashed. Is this normal?<br>
Everything works now.<br>Next step is to loop to solve for each member of the set S and try to read the data from a database.<br>Thanks again, FlopC++ is a great product.<br>Mario<br><br><div class="gmail_quote">On Tue, Dec 1, 2009 at 10:42 AM, Tim Hultberg <span dir="ltr"><<a href="mailto:Tim.Hultberg@eumetsat.int">Tim.Hultberg@eumetsat.int</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-GB">
<div><div><div></div><div class="h5">
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Hi Mario,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> here are some answers:</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">1. Yes, that is possible.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">2. You can output the problem in MPS format or 'lp format'. See
the recent mails on the list about how to do this.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">3.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">4. You cant. Flopc++ can only be used to model LPs and will not
allow you to divide with an expression involving decision variables.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">5.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">6. </span></p>
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<p class="MsoNormal" style="line-height: 130%;"><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(68, 85, 136);">void</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> MP_constraint<b>::</b>display</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">(</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">string
s</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">)</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> <b>const</b> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">{</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">89</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> cout<b><<</b>s<b><<</b>endl</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">;</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">90</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> <b>if</b> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">(</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">offset
<b>>=</b></span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(0, 153, 153);">0</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">)</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">{</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">91</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> <b>for</b> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">(</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(68, 85, 136);">int</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> i<b>=</b>offset</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">;</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> i<b><</b>offset<b>+</b>size</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">();</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> i<b>++</b></span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">)</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">{</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">92</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">
cout<b><<</b>i<b><<</b></span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(187, 136, 68);">" "</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">M<b>-></b>bl</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">[</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">i</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">]</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(187, 136, 68);">"
"</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">M<b>-></b>rowActivity</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">[</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">i</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">]</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(187, 136, 68);">"
"</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">M<b>-></b>bu</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">[</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">i</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">]</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(187, 136, 68);">"
"</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">M<b>-></b>rowPrice</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">[</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">i</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">]</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">endl</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">;</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">93</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">}</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">94</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">}</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> <b>else</b> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">{</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">95</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">
cout<b><<</b></span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: rgb(187, 136, 68);">"No solution available!"</span><b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"><<</span></b><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">endl</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">;</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">96</span></a></span></p>
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<td style="border-style: none solid none none; border-color: -moz-use-text-color rgb(221, 221, 221) -moz-use-text-color -moz-use-text-color; border-width: medium 1pt medium medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"> </span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">}</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<td style="border-style: none solid solid; border-color: -moz-use-text-color rgb(215, 215, 215) rgb(153, 153, 136) rgb(221, 221, 221); border-width: medium 1pt 1pt; padding: 0cm 6pt; background: rgb(238, 238, 221) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="text-align: right; line-height: 130%;" align="right"><span style="font-size: 8.5pt; line-height: 130%; color: rgb(136, 136, 102);"><a><span style="border: 1pt none windowtext; padding: 0cm; color: rgb(136, 136, 102); text-decoration: none;">97</span></a></span></p>
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<td style="border-style: none solid solid none; border-color: -moz-use-text-color rgb(221, 221, 221) rgb(221, 221, 221) -moz-use-text-color; border-width: medium 1pt 1pt medium; padding: 0.75pt 1.5pt; background: white none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" valign="top">
<p class="MsoNormal" style="line-height: 130%;"><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;">}</span><span style="font-size: 8.5pt; line-height: 130%; font-family: "Courier New"; color: black;"></span></p>
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<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I know I didn’t answer everthing, but I have to go now..</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Tim</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;" lang="EN-US">From:</span></b><span style="font-size: 10pt;" lang="EN-US"> <a href="mailto:flopcpp-bounces@list.coin-or.org" target="_blank">flopcpp-bounces@list.coin-or.org</a>
[mailto:<a href="mailto:flopcpp-bounces@list.coin-or.org" target="_blank">flopcpp-bounces@list.coin-or.org</a>] <b>On Behalf Of </b>Mario Rappi<br>
<b>Sent:</b> Sunday, November 29, 2009 2:47 AM<br>
<b>To:</b> <a href="mailto:flopcpp@list.coin-or.org" target="_blank">flopcpp@list.coin-or.org</a><br>
<b>Subject:</b> [FlopCpp] wrote first flopcpp model. have a lot of questions</span></p>
</div>
<p class="MsoNormal"> </p>
</div></div><p class="MsoNormal">First I include the model, then the output, and at the end
the questions:</p><div><div></div><div class="h5"><br>
<br>
*****model************************<br>
// $Id$<br>
#include "flopc.hpp"<br>
using namespace flopc;<br>
#include <OsiClpSolverInterface.hpp><br>
<br>
int main() {<br>
<br>
MP_model &model = MP_model::getDefaultModel();<br>
model.setSolver(new OsiClpSolverInterface);<br>
model.verbose();<br>
<br>
enum {storeA, storeB, storeC, storeD, numS}; <br>
enum {Input1, Input2, numI};<br>
enum {Output1, numO};<br>
<br>
MP_set
S(numS); // Stores<br>
MP_set I(numI);
// Inputs<br>
MP_set O(numO);
// Outputs<br>
<br>
MP_subset<2> Input(S,I);<br>
Input.insert(S,I);<br>
Input.display("Input");<br>
MP_subset<2> Output(S,O);<br>
Output.insert(S,O);<br>
Output.display("Output");<br>
<br>
//this will be easier with an array??<br>
MP_data InputVal(Input);<br>
InputVal(storeA,Input1)=1; InputVal(storeA,Input2)=3;<br>
InputVal(storeB,Input1)=3; InputVal(storeB,Input2)=3;<br>
InputVal(storeC,Input1)=4; InputVal(storeC,Input2)=2;<br>
InputVal(storeD,Input1)=3; InputVal(storeD,Input2)=1;<br>
<br>
MP_data OutputVal(Output);<br>
OutputVal(storeA,Output1)=1;<br>
OutputVal(storeB,Output1)=1.5;<br>
OutputVal(storeC,Output1)=2;<br>
OutputVal(storeD,Output1)=1;<br>
<br>
MP_variable x(I), y(O);<br>
x.lowerLimit(I)=0;<br>
y.lowerLimit(O)=0;<br>
<br>
MP_constraint efficiency(S);<br>
efficiency(S) = sum(I, InputVal(S, I) * x(I)) <= sum(O,
OutputVal(S, O) * y(O));<br>
<br>
minimize( (sum(O, OutputVal(storeB, O) * y(O))) - (sum(I,
InputVal(storeB, I) * x(I))));<br>
<br>
efficiency.display("constraints");<br>
x.display("x");<br>
y.display("y");<br>
<br>
cout<<"Test dea passed."<<endl;<br>
}<br>
*****model end************************<br>
<br>
*****output************************<br>
Input<br>
Output<br>
FlopCpp: Constraint <br>
0 1 0 0<br>
1 1 0 0<br>
2 1 0 0<br>
3 1 0 0<br>
0 2 0 0<br>
1 2 0 0<br>
2 2 0 0<br>
3 2 0 0<br>
0 0 -0 0<br>
1 0 -0 0<br>
2 0 -0 0<br>
3 0 -0 0<br>
FlopCpp: Number of constraint blocks: 1<br>
FlopCpp: Number of individual constraints: 4<br>
FlopCpp: Number of variable blocks: 2<br>
FlopCpp: Number of individual variables: 3<br>
FlopCpp: Number of non-zeroes (including rhs): 12<br>
Objective <br>
-1 0 0<br>
-1 1 -0<br>
-1 2 -0<br>
FlopCpp: Generation time: -2.64274e-19<br>
Clp0000I Optimal - objective value 0<br>
Clp0032I Optimal objective 0 - 0 iterations time 0.002<br>
FlopCpp: Optimal obj. value = 0<br>
FlopCpp: Solver(m, n, nz) = 4 3 0<br>
constraints<br>
0 -1.79769e+308 0 0 -0<br>
1 -1.79769e+308 0 0 -0<br>
2 -1.79769e+308 0 0 -0<br>
3 -1.79769e+308 0 0 -0<br>
x<br>
0 0<br>
1 0<br>
y<br>
0 0<br>
Test dea passed.<br>
*****output end************************<br>
<br>
*****Questions:******************<br>
I would like to define a set A that includes all members of O and I and then
derive O and I from A.<br>
This is what I am thinking in GAMS terms:<br>
A / Input1, Input2, Output1 /<br>
O(A) / Input1, Input2 /<br>
I(A) / Output1 /<br>
Is this possible?. I thought it would allow me to write the model more easily
(but may be not)<br>
*******************<br>
I tried to display the constraints but I didn't get what I was expecting (the
actual mathematical expression). Is it possible to see the constraints in any
other way?<br>
*******************<br>
When I compile I get the following two warnings. Should I be concerned? How do
I fix them?<br>
<br>
c:\program files\coin-flopcpp\flopcpp\src\mp_set.hpp(259) : warning C4267:
'return' : conversion from 'size_t' to 'int', possible loss of data<br>
c:\program files\coin-flopcpp\flopcpp\src\mp_set.hpp(258)
: while compiling class template member function 'int
flopc::MP_subset<nbr>::size(void) const'<br>
with<br>
[<br>
nbr=2<br>
]<br>
c:\program
files\coin-flopcpp\flopcpp\examples\dea.cpp(21) : see reference to class
template instantiation 'flopc::MP_subset<nbr>' being compiled<br>
with<br>
[<br>
nbr=2<br>
]<br>
c:\program files\coin-flopcpp\flopcpp\src\mp_set.hpp(243) : warning C4267:
'initializing' : conversion from 'size_t' to 'const int', possible loss of data<br>
c:\program
files\coin-flopcpp\flopcpp\src\mp_set.hpp(232) : while compiling class template
member function 'void flopc::MP_subset<nbr>::insert(const
std::vector<_Ty> &)'<br>
with<br>
[<br>
nbr=2,<br>
_Ty=int<br>
]<br>
<br>
*******************<br>
The objective function that I really want to use is<br>
maximize( (sum(O, OutputVal(storeB, O) * y(O))) / (sum(I, InputVal(storeB, I) *
x(I))));<br>
But it doesn't compile, I get this error:<br>
<br>
c:\program files\coin-flopcpp\flopcpp\examples\dea.cpp(51) : error C2678:
binary '/' : no operator found which takes a left-hand operand of type
'flopc::MP_expression' (or there is no acceptable conversion)<br>
c:\program
files\coin-flopcpp\flopcpp\src\mp_constant.hpp(141): could be 'flopc::Constant
flopc::operator /(const flopc::Constant &,const flopc::Constant &)'<br>
c:\program
files\coin-flopcpp\coinutils\src\coinpackedvector.hpp(483):
or 'CoinPackedVector operator /(const
CoinPackedVectorBase &,const CoinPackedVectorBase &)'<br>
c:\program
files\coin-flopcpp\coinutils\src\coinpackedvector.hpp(583):
or 'CoinPackedVector operator /(const
CoinPackedVectorBase &,double)'<br>
c:\program
files\coin-flopcpp\coinutils\src\coinpackedvector.hpp(625): or
'CoinPackedVector operator /(double,const CoinPackedVectorBase &)'<br>
while trying to match the argument
list '(flopc::MP_expression, flopc::MP_expression)'<br>
<br>
I am using MSVCPP, I read of some problems specific to VCPP so I tried the same
in Linux(I think it is build-essential in Ubuntu) but I get the same errors.<br>
How can I fix this problem with the division operation?<br>
*******************<br>
Is my formulation of the objective function OK in how I sum only for storeB or
do I have to use such_that or any other type of control?<br>
How do I display the objective function?<br>
*******************<br>
What are these numbers in the output?<br>
constraints<br>
0 -1.79769e+308 0 0 -0<br>
1 -1.79769e+308 0 0 -0<br>
2 -1.79769e+308 0 0 -0<br>
3 -1.79769e+308 0 0 -0<br>
My four constraints are supposed to have only three terms (two on the left and
one on the right)<br>
********************<br>
What is this?<br>
Objective <br>
-1 0 0<br>
-1 1 -0<br>
-1 2 -0<br>
********************<br>
<br>
If it helps at all: the model is a simple DEA formulation (primal).<br>
I understand some of my questions may be more C++ than flopcpp questions but I
can't tell.<br>
I will appreciate help on any of these questions and on any other comments you
may have on the model formulation.<br>
Thanks in advance.<br>
Mario</div></div>
</div>
</div>
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<br></blockquote></div><br>