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3  Getting Solution Information
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5  Getting Solution Information
6  </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch02s03.html">Prev</a> </td><th width="60%" align="center">Chapter 2. 
7   The CBC Model Class
8  </th><td width="20%" align="right"> <a accesskey="n" href="ch02s05.html">Next</a></td></tr></table><hr/></div><div class="section" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="gettingsolution"/>
9  Getting Solution Information
10  </h2></div></div><div/></div><p>
11  Optimality can be checked through a call to <tt class="function">model.isProvenOptimal()</tt>.  Also
12  available are <tt class="function">isProvenInfeasible()</tt>,
13  <tt class="function">isSolutionLimitReached()</tt>,
14  <tt class="function">isNodeLimitReached()</tt> or the feared
15  <tt class="function">isAbandoned()</tt>. There is also
16  <tt class="function">int status()</tt> which returns 0 if finished (which includes the case when the algorithm is finished because it has been proved infeasible), 1 if stopped by user, and 2 if difficulties arose.
17  </p><p>
18  In addition to these <tt class="classname">CbcModel</tt> methods, solution values can be accessed via OSI methods.  The OSI methods pick up the current solution in the <tt class="classname">CBCModel</tt>.  The current solution will match the best solution found so far if called after <tt class="function">branchAndBound()</tt> and a solution was found.
[559]19  </p><div class="table"><a id="id2993738"/><p class="title"><b>Table 2.1. 
[557]20  Methods for Getting Solution Information from OSI
21  </b></p><table summary="&#10;  Methods for Getting Solution Information from OSI &#10;  " border="0"><colgroup><col/><col/></colgroup><thead><tr><th>
22      Purpose
23      </th><th>
24      Name
25      </th><th>
26      Notes
27      </th></tr></thead><tbody><tr><td align="left" valign="top">
28      Primal column solution
29      </td><td align="left" valign="top"><tt class="function">const double * getColSolution()</tt></td><td align="left" valign="top">
30      The OSI method will return the best solution found thus far, unless none has been found. It is safer to use <tt class="classname">CbcModel</tt> version, <tt class="function">CbcModel::bestSolution()</tt></td></tr><tr><td align="left" valign="top">
31      Dual row solution
32      </td><td align="left" valign="top"><tt class="function">const double * getRowPrice()</tt></td><td align="left" valign="top">
33      Identical <tt class="classname">CbcModel</tt> version available, <tt class="function">CbcModel::getRowPrice()</tt>.
34      </td></tr><tr><td align="left" valign="top">
35      Primal row solution
36      </td><td align="left" valign="top"><tt class="function">const double * getRowActivity()</tt></td><td align="left" valign="top">
37      Identical <tt class="classname">CbcModel</tt> version available, <tt class="function">CbcModel::getRowActivity()</tt>.
38      </td></tr><tr><td align="left" valign="top">
39      Dual column solution
40      </td><td align="left" valign="top"><tt class="function">const double * getReducedCost()</tt></td><td align="left" valign="top">
41      Identical <tt class="classname">CbcModel</tt> version available, <tt class="function">CbcModel::gtReducedCost()</tt>.
42      </td></tr><tr><td align="left" valign="top">
43      Number of rows in model
44      </td><td align="left" valign="top"><tt class="function">int getNumRows()</tt></td><td align="left" valign="top">
45      Identical <tt class="classname">CbcModel</tt> version available, <tt class="function">CbcModel::getNumRows()</tt>. Note: the number of rows can change due to cuts.
46      </td></tr><tr><td align="left" valign="top">
47      Number of columns in model
48      </td><td align="left" valign="top"><tt class="function">int getNumCols()</tt></td><td align="left" valign="top">
49      Identical <tt class="classname">CbcModel</tt> version available, <tt class="function">CbcModel::getNumCols()</tt>.
50      </td></tr></tbody></table></div></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch02s03.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch02s05.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">
51The Relationship Between OSI and CBC
52 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 
53   Useful Set and Get Methods in CbcModel
[554]54  </td></tr></table></div></body></html>
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