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| <h1>SRC/dzsum1.c File Reference</h1>Takes sum of the absolute values of a <a class="el" href="structcomplex.html">complex</a> vector and returns a double precision result. <a href="#_details">More...</a> |
| <p> |
| <code>#include "<a class="el" href="slu__dcomplex_8h-source.html">slu_dcomplex.h</a>"</code><br> |
| <code>#include "<a class="el" href="slu__Cnames_8h-source.html">slu_Cnames.h</a>"</code><br> |
| <table border="0" cellpadding="0" cellspacing="0"> |
| <tr><td></td></tr> |
| <tr><td colspan="2"><br><h2>Defines</h2></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="dzsum1_8c.html#5a76da95c549c41790389a76e12fdcb5">CX</a>(I) cx[(I)-1]</td></tr> |
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| <tr><td colspan="2"><br><h2>Functions</h2></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="dzsum1_8c.html#3fade9d45be0f00827565d6d0f37fe5d">dzsum1_</a> (int *n, <a class="el" href="structdoublecomplex.html">doublecomplex</a> *cx, int *incx)</td></tr> |
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| <hr><a name="_details"></a><h2>Detailed Description</h2> |
| <pre> |
| -- LAPACK auxiliary routine (version 2.0) -- |
| Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., |
| Courant Institute, Argonne National Lab, and Rice University |
| October 31, 1992 |
| </pre> <hr><h2>Define Documentation</h2> |
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| <td class="memname">#define CX </td> |
| <td>(</td> |
| <td class="paramtype">I </td> |
| <td class="paramname"> </td> |
| <td> ) </td> |
| <td width="100%"> cx[(I)-1]</td> |
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| <p> |
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| <hr><h2>Function Documentation</h2> |
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| <td class="memname">double dzsum1_ </td> |
| <td>(</td> |
| <td class="paramtype">int * </td> |
| <td class="paramname"> <em>n</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structdoublecomplex.html">doublecomplex</a> * </td> |
| <td class="paramname"> <em>cx</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">int * </td> |
| <td class="paramname"> <em>incx</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
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| <p> |
| <pre> |
| Purpose |
| =======</pre><p> |
| <pre> DZSUM1 takes the sum of the absolute values of a <a class="el" href="structcomplex.html">complex</a> |
| vector and returns a double precision result.</pre><p> |
| <pre> Based on DZASUM from the Level 1 BLAS. |
| The change is to use the 'genuine' absolute value.</pre><p> |
| <pre> Contributed by Nick Higham for use with ZLACON.</pre><p> |
| <pre> Arguments |
| =========</pre><p> |
| <pre> N (input) INT |
| The number of elements in the vector CX.</pre><p> |
| <pre> CX (input) COMPLEX*16 array, dimension (N) |
| The vector whose elements will be summed.</pre><p> |
| <pre> INCX (input) INT |
| The spacing between successive values of CX. INCX > 0.</pre><p> |
| <pre> ===================================================================== |
| </pre> |
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