<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.5"/> <title>Eigen-unsupported: SVDBase< _MatrixType > Class Template Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); $(window).load(resizeHeight); </script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> $(document).ready(function() { searchBox.OnSelectItem(0); }); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> <link href="eigendoxy.css" rel="stylesheet" type="text/css"> <!-- --> <script type="text/javascript" src="eigen_navtree_hacks.js"></script> <!-- <script type="text/javascript"> --> <!-- </script> --> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! 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In case of a rectangular n-by-p matrix, letting <em>m</em> be the smaller value among <em>n</em> and <em>p</em>, there are only <em>m</em> singular vectors; the remaining columns of <em>U</em> and <em>V</em> do not correspond to actual singular vectors. Asking for <em>thin</em> <em>U</em> or <em>V</em> means asking for only their <em>m</em> first columns to be formed. So <em>U</em> is then a n-by-m matrix, and <em>V</em> is then a p-by-m matrix. Notice that thin <em>U</em> and <em>V</em> are all you need for (least squares) solving.</p> <p>If the input matrix has inf or nan coefficients, the result of the computation is undefined, but the computation is guaranteed to terminate in finite (and reasonable) time. </p> <dl class="section see"><dt>See Also</dt><dd>MatrixBase::genericSvd() </dd></dl> </div><div id="dynsection-0" onclick="return toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"> <img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for SVDBase< _MatrixType >:</div> <div id="dynsection-0-summary" class="dynsummary" style="display:block;"> </div> <div id="dynsection-0-content" class="dyncontent" style="display:none;"> <div class="center"><img src="classEigen_1_1SVDBase__inherit__graph.png" border="0" usemap="#SVDBase_3_01__MatrixType_01_4_inherit__map" alt="Inheritance graph"/></div> <map name="SVDBase_3_01__MatrixType_01_4_inherit__map" id="SVDBase_3_01__MatrixType_01_4_inherit__map"> <area shape="rect" id="node2" href="classEigen_1_1BDCSVD.html" title="class Bidiagonal Divide and Conquer SVD " alt="" coords="5,483,179,810"/><area shape="rect" id="node3" href="classEigen_1_1JacobiSVD.html" title="Two-sided Jacobi SVD decomposition of a rectangular matrix. " alt="" coords="204,557,388,737"/></map> </div> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:a83297cc5d915af5132f5161b62a7a650"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classEigen_1_1SVDBase.html">SVDBase</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#a83297cc5d915af5132f5161b62a7a650">compute</a> (const MatrixType &matrix, unsigned int computationOptions)</td></tr> <tr class="memdesc:a83297cc5d915af5132f5161b62a7a650"><td class="mdescLeft"> </td><td class="mdescRight">Method performing the decomposition of given matrix using custom options. <a href="#a83297cc5d915af5132f5161b62a7a650">More...</a><br/></td></tr> <tr class="separator:a83297cc5d915af5132f5161b62a7a650"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a7af4db91caadd1b5e12cdc1384a18bd7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classEigen_1_1SVDBase.html">SVDBase</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#a7af4db91caadd1b5e12cdc1384a18bd7">compute</a> (const MatrixType &matrix)</td></tr> <tr class="memdesc:a7af4db91caadd1b5e12cdc1384a18bd7"><td class="mdescLeft"> </td><td class="mdescRight">Method performing the decomposition of given matrix using current options. <a href="#a7af4db91caadd1b5e12cdc1384a18bd7">More...</a><br/></td></tr> <tr class="separator:a7af4db91caadd1b5e12cdc1384a18bd7"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a1ffab6aab715fe0918a841611a95e9aa"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#a1ffab6aab715fe0918a841611a95e9aa">computeU</a> () const </td></tr> <tr class="separator:a1ffab6aab715fe0918a841611a95e9aa"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a92e99646eefbeb071ef220841555a703"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#a92e99646eefbeb071ef220841555a703">computeV</a> () const </td></tr> <tr class="separator:a92e99646eefbeb071ef220841555a703"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a49e16a4adf4fe58a2d65a5e5a31e7654"><td class="memItemLeft" align="right" valign="top">const MatrixUType & </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#a49e16a4adf4fe58a2d65a5e5a31e7654">matrixU</a> () const </td></tr> <tr class="separator:a49e16a4adf4fe58a2d65a5e5a31e7654"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ae5158ab7ca44a705c2a3b56ec926b42a"><td class="memItemLeft" align="right" valign="top">const MatrixVType & </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#ae5158ab7ca44a705c2a3b56ec926b42a">matrixV</a> () const </td></tr> <tr class="separator:ae5158ab7ca44a705c2a3b56ec926b42a"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aa468765ea9b7f0e92380fa206e6498bd"><td class="memItemLeft" align="right" valign="top">Index </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#aa468765ea9b7f0e92380fa206e6498bd">nonzeroSingularValues</a> () const </td></tr> <tr class="separator:aa468765ea9b7f0e92380fa206e6498bd"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a48d4068b97dfbb83d62599e56e26797a"><td class="memItemLeft" align="right" valign="top">const SingularValuesType & </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#a48d4068b97dfbb83d62599e56e26797a">singularValues</a> () const </td></tr> <tr class="separator:a48d4068b97dfbb83d62599e56e26797a"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a> Protected Member Functions</h2></td></tr> <tr class="memitem:aa64c67571945053f2fe3ec5163045bbd"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classEigen_1_1SVDBase.html#aa64c67571945053f2fe3ec5163045bbd">SVDBase</a> ()</td></tr> <tr class="memdesc:aa64c67571945053f2fe3ec5163045bbd"><td class="mdescLeft"> </td><td class="mdescRight">Default Constructor. <a href="#aa64c67571945053f2fe3ec5163045bbd">More...</a><br/></td></tr> <tr class="separator:aa64c67571945053f2fe3ec5163045bbd"><td class="memSeparator" colspan="2"> </td></tr> </table> <h2 class="groupheader">Constructor & Destructor Documentation</h2> <a class="anchor" id="aa64c67571945053f2fe3ec5163045bbd"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname"><a class="el" href="classEigen_1_1SVDBase.html">SVDBase</a> </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">protected</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Default Constructor. </p> <p>Default constructor of <a class="el" href="classEigen_1_1SVDBase.html" title="Mother class of SVD classes algorithms. ">SVDBase</a> </p> </div> </div> <h2 class="groupheader">Member Function Documentation</h2> <a class="anchor" id="a83297cc5d915af5132f5161b62a7a650"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="classEigen_1_1SVDBase.html">SVDBase</a>& compute </td> <td>(</td> <td class="paramtype">const MatrixType & </td> <td class="paramname"><em>matrix</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">unsigned int </td> <td class="paramname"><em>computationOptions</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Method performing the decomposition of given matrix using custom options. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">matrix</td><td>the matrix to decompose </td></tr> <tr><td class="paramname">computationOptions</td><td>optional parameter allowing to specify if you want full or thin U or V unitaries to be computed. By default, none is computed. This is a bit-field, the possible bits are #ComputeFullU, #ComputeThinU, #ComputeFullV, #ComputeThinV.</td></tr> </table> </dd> </dl> <p>Thin unitaries are only available if your matrix type has a Dynamic number of columns (for example MatrixXf). They also are not available with the (non-default) FullPivHouseholderQR preconditioner. </p> </div> </div> <a class="anchor" id="a7af4db91caadd1b5e12cdc1384a18bd7"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="classEigen_1_1SVDBase.html">SVDBase</a>& compute </td> <td>(</td> <td class="paramtype">const MatrixType & </td> <td class="paramname"><em>matrix</em></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Method performing the decomposition of given matrix using current options. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">matrix</td><td>the matrix to decompose</td></tr> </table> </dd> </dl> <p>This method uses the current <em>computationOptions</em>, as already passed to the constructor or to <a class="el" href="classEigen_1_1SVDBase.html#a83297cc5d915af5132f5161b62a7a650" title="Method performing the decomposition of given matrix using custom options. ">compute(const MatrixType&, unsigned int)</a>. </p> </div> </div> <a class="anchor" id="a1ffab6aab715fe0918a841611a95e9aa"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">bool computeU </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section return"><dt>Returns</dt><dd>true if <em>U</em> (full or thin) is asked for in this SVD decomposition </dd></dl> <p>Referenced by <a class="el" href="classEigen_1_1SVDBase.html#a49e16a4adf4fe58a2d65a5e5a31e7654">SVDBase< _MatrixType >::matrixU()</a>.</p> </div> </div> <a class="anchor" id="a92e99646eefbeb071ef220841555a703"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">bool computeV </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section return"><dt>Returns</dt><dd>true if <em>V</em> (full or thin) is asked for in this SVD decomposition </dd></dl> <p>Referenced by <a class="el" href="classEigen_1_1SVDBase.html#ae5158ab7ca44a705c2a3b56ec926b42a">SVDBase< _MatrixType >::matrixV()</a>.</p> </div> </div> <a class="anchor" id="a49e16a4adf4fe58a2d65a5e5a31e7654"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">const MatrixUType& matrixU </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section return"><dt>Returns</dt><dd>the <em>U</em> matrix.</dd></dl> <p>For the <a class="el" href="classEigen_1_1SVDBase.html" title="Mother class of SVD classes algorithms. ">SVDBase</a> decomposition of a n-by-p matrix, letting <em>m</em> be the minimum of <em>n</em> and <em>p</em>, the U matrix is n-by-n if you asked for #ComputeFullU, and is n-by-m if you asked for #ComputeThinU.</p> <p>The <em>m</em> first columns of <em>U</em> are the left singular vectors of the matrix being decomposed.</p> <p>This method asserts that you asked for <em>U</em> to be computed. </p> <p>References <a class="el" href="classEigen_1_1SVDBase.html#a1ffab6aab715fe0918a841611a95e9aa">SVDBase< _MatrixType >::computeU()</a>.</p> </div> </div> <a class="anchor" id="ae5158ab7ca44a705c2a3b56ec926b42a"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">const MatrixVType& matrixV </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section return"><dt>Returns</dt><dd>the <em>V</em> matrix.</dd></dl> <p>For the SVD decomposition of a n-by-p matrix, letting <em>m</em> be the minimum of <em>n</em> and <em>p</em>, the V matrix is p-by-p if you asked for #ComputeFullV, and is p-by-m if you asked for ComputeThinV.</p> <p>The <em>m</em> first columns of <em>V</em> are the right singular vectors of the matrix being decomposed.</p> <p>This method asserts that you asked for <em>V</em> to be computed. </p> <p>References <a class="el" href="classEigen_1_1SVDBase.html#a92e99646eefbeb071ef220841555a703">SVDBase< _MatrixType >::computeV()</a>.</p> </div> </div> <a class="anchor" id="aa468765ea9b7f0e92380fa206e6498bd"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">Index nonzeroSingularValues </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section return"><dt>Returns</dt><dd>the number of singular values that are not exactly 0 </dd></dl> </div> </div> <a class="anchor" id="a48d4068b97dfbb83d62599e56e26797a"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">const SingularValuesType& singularValues </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span></span> </td> </tr> </table> </div><div class="memdoc"> <dl class="section return"><dt>Returns</dt><dd>the vector of singular values.</dd></dl> <p>For the SVD decomposition of a n-by-p matrix, letting <em>m</em> be the minimum of <em>n</em> and <em>p</em>, the returned vector has size <em>m</em>. Singular values are always sorted in decreasing order. </p> </div> </div> <hr/>The documentation for this class was generated from the following file:<ul> <li><a class="el" href="SVDBase_8h_source.html">SVDBase.h</a></li> </ul> </div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="namespaceEigen.html">Eigen</a></li><li class="navelem"><a class="el" href="classEigen_1_1SVDBase.html">SVDBase</a></li> <li class="footer">Generated on Mon Oct 28 2013 11:05:27 for Eigen-unsupported by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.5 </li> </ul> </div> <!-- Piwik --> <!-- <script type="text/javascript"> var pkBaseURL = (("https:" == document.location.protocol) ? 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