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<h1>SRC/izmax1.c File Reference</h1>Finds the index of the element whose real part has maximum absolute value. <a href="#_details">More...</a>
<p>
<code>#include <math.h></code><br>
<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>
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<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="izmax1_8c.html#5a76da95c549c41790389a76e12fdcb5">CX</a>(I) cx[(I)-1]</td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="izmax1_8c.html#99d3cc85eec418b836a4949ead25c297">izmax1_</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>
<a class="anchor" name="5a76da95c549c41790389a76e12fdcb5"></a><!-- doxytag: member="izmax1.c::CX" ref="5a76da95c549c41790389a76e12fdcb5" args="(I)" -->
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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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<hr><h2>Function Documentation</h2>
<a class="anchor" name="99d3cc85eec418b836a4949ead25c297"></a><!-- doxytag: member="izmax1.c::izmax1_" ref="99d3cc85eec418b836a4949ead25c297" args="(int *n, doublecomplex *cx, int *incx)" -->
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<td class="memname">int izmax1_ </td>
<td>(</td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>n</em>, </td>
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<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>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>incx</em></td><td> </td>
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<td></td>
<td>)</td>
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<pre>
Purpose
=======</pre><p>
<pre> IZMAX1 finds the index of the element whose real part has maximum
absolute value.</pre><p>
<pre> Based on IZAMAX from 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 >= 1.</pre><p>
<pre> =====================================================================
</pre>
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