| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> |
| <title>SuperLU: SRC/sgscon.c File Reference</title> |
| <link href="doxygen.css" rel="stylesheet" type="text/css"> |
| <link href="tabs.css" rel="stylesheet" type="text/css"> |
| </head><body> |
| |
| <div class="navigation" id="top"> |
| <div class="tabs"> |
| <ul> |
| <li><a href="index.html"><span>Main Page</span></a></li> |
| <li><a href="annotated.html"><span>Data Structures</span></a></li> |
| <li class="current"><a href="files.html"><span>Files</span></a></li> |
| </ul> |
| </div> |
| </div> |
| <div class="contents"> |
| <h1>SRC/sgscon.c File Reference</h1>Estimates reciprocal of the condition number of a general matrix. <a href="#_details">More...</a> |
| <p> |
| <code>#include <math.h></code><br> |
| <code>#include "<a class="el" href="slu__sdefs_8h-source.html">slu_sdefs.h</a>"</code><br> |
| <table border="0" cellpadding="0" cellspacing="0"> |
| <tr><td></td></tr> |
| <tr><td colspan="2"><br><h2>Functions</h2></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="sgscon_8c.html#76b21c7561d5bce81821a76c3465601b">sgscon</a> (char *norm, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *L, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *U, float anorm, float *rcond, <a class="el" href="structSuperLUStat__t.html">SuperLUStat_t</a> *stat, int *info)</td></tr> |
| |
| </table> |
| <hr><a name="_details"></a><h2>Detailed Description</h2> |
| <pre> |
| -- SuperLU routine (version 3.0) -- |
| Univ. of California Berkeley, Xerox Palo Alto Research Center, |
| and Lawrence Berkeley National Lab. |
| October 15, 2003</pre><p> |
| <pre> Modified from lapack routines SGECON. |
| </pre> <hr><h2>Function Documentation</h2> |
| <a class="anchor" name="76b21c7561d5bce81821a76c3465601b"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void sgscon </td> |
| <td>(</td> |
| <td class="paramtype">char * </td> |
| <td class="paramname"> <em>norm</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> * </td> |
| <td class="paramname"> <em>L</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> * </td> |
| <td class="paramname"> <em>U</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float </td> |
| <td class="paramname"> <em>anorm</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">float * </td> |
| <td class="paramname"> <em>rcond</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structSuperLUStat__t.html">SuperLUStat_t</a> * </td> |
| <td class="paramname"> <em>stat</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">int * </td> |
| <td class="paramname"> <em>info</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td><td width="100%"></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| <pre> |
| Purpose |
| =======</pre><p> |
| <pre> SGSCON estimates the reciprocal of the condition number of a general |
| real matrix A, in either the 1-norm or the infinity-norm, using |
| the LU factorization computed by SGETRF. *</pre><p> |
| <pre> An estimate is obtained for norm(inv(A)), and the reciprocal of the |
| condition number is computed as |
| RCOND = 1 / ( norm(A) * norm(inv(A)) ).</pre><p> |
| <pre> See <a class="el" href="supermatrix_8h.html" title="Defines matrix types.">supermatrix.h</a> for the definition of 'SuperMatrix' structure.</pre><p> |
| <pre> Arguments |
| =========</pre><p> |
| <pre> NORM (input) char* |
| Specifies whether the 1-norm condition number or the |
| infinity-norm condition number is required: |
| = '1' or 'O': 1-norm; |
| = 'I': Infinity-norm.</pre><p> |
| <pre> L (input) SuperMatrix* |
| The factor L from the factorization Pr*A*Pc=L*U as computed by |
| <a class="el" href="sgstrf_8c.html#2428d5d7ef46cf9a08069d9f55901284">sgstrf()</a>. Use compressed row subscripts storage for supernodes, |
| i.e., L has types: Stype = SLU_SC, Dtype = SLU_S, Mtype = SLU_TRLU.</pre><p> |
| <pre> U (input) SuperMatrix* |
| The factor U from the factorization Pr*A*Pc=L*U as computed by |
| <a class="el" href="sgstrf_8c.html#2428d5d7ef46cf9a08069d9f55901284">sgstrf()</a>. Use column-wise storage scheme, i.e., U has types: |
| Stype = SLU_NC, Dtype = SLU_S, Mtype = SLU_TRU.</pre><p> |
| <pre> ANORM (input) float |
| If NORM = '1' or 'O', the 1-norm of the original matrix A. |
| If NORM = 'I', the infinity-norm of the original matrix A.</pre><p> |
| <pre> RCOND (output) float* |
| The reciprocal of the condition number of the matrix A, |
| computed as RCOND = 1/(norm(A) * norm(inv(A))).</pre><p> |
| <pre> INFO (output) int* |
| = 0: successful exit |
| < 0: if INFO = -i, the i-th argument had an illegal value</pre><p> |
| <pre> ===================================================================== |
| </pre> |
| </div> |
| </div><p> |
| </div> |
| <hr size="1"><address style="text-align: right;"><small>Generated on Mon Nov 22 10:23:48 2010 for SuperLU by |
| <a href="http://www.doxygen.org/index.html"> |
| <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.5 </small></address> |
| </body> |
| </html> |