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<head><title>psb_genrm2s &#8212; Generalized 2-Norm of Vector</title> 
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   <h4 class="subsectionHead"><span class="titlemark">4.9   </span> <a 
 id="x27-640004.9"></a>psb_genrm2s &#8212; Generalized 2-Norm of Vector</h4>
<!--l. 739--><p class="noindent" >This subroutine computes a series of 2-norms on the columns of a dense matrix
<span 
class="cmmi-10">x</span>:
   <center class="math-display" >
<img 
src="userhtml15x.png" alt="res(i) &#x2190; &#x2225;x(:,i)&#x2225;2
" class="math-display" ></center>
<!--l. 741--><p class="nopar" >
<!--l. 744--><p class="indent" >   <span class="lstinline"></span><span 
class="cmtt-10">call</span><span 
class="cmtt-10">&#x00A0;</span><span 
class="cmtt-10">psb_genrm2s</span><span 
class="cmtt-10">(</span><span 
class="cmtt-10">res</span><span 
class="cmtt-10">,</span><span 
class="cmtt-10">&#x00A0;</span><span 
class="cmtt-10">x</span><span 
class="cmtt-10">,</span><span 
class="cmtt-10">&#x00A0;</span><span 
class="cmtt-10">desc_a</span><span 
class="cmtt-10">,</span><span 
class="cmtt-10">&#x00A0;</span><span 
class="cmtt-10">info</span><span 
class="cmtt-10">)</span>
   <div class="table">
                                                                  

                                                                  
<!--l. 746--><p class="indent" >   <a 
 id="x27-64001r9"></a><hr class="float"><div class="float" 
>
                                                                  

                                                                  
<div class="center" 
>
<!--l. 747--><p class="noindent" >
<div class="tabular"> <table id="TBL-9" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-9-1g"><col 
id="TBL-9-1"><col 
id="TBL-9-2"><col 
id="TBL-9-3"></colgroup><tr 
class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-9-1-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-1-1"  
class="td11"><span 
class="cmmi-10">res                  </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-1-2"  
class="td11"><span 
class="cmmi-10">x                          </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-1-3"  
class="td11"><span 
class="cmbx-10">Subroutine</span></td></tr><tr 
class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-9-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-2-1"  
class="td11">Short Precision Real</td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-2-2"  
class="td11">Short Precision Real </td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-2-3"  
class="td11">psb_genrm2s</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-3-1"  
class="td11">Long Precision Real </td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-3-2"  
class="td11">Long Precision Real      </td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-3-3"  
class="td11">psb_genrm2s</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-4-1"  
class="td11">Short Precision Real</td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-4-2"  
class="td11">Short Precision Complex</td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-4-3"  
class="td11">psb_genrm2s</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-5-1"  
class="td11">Long Precision Real </td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-5-2"  
class="td11">Long Precision Complex </td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-5-3"  
class="td11">psb_genrm2s</td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-9-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-6-1"  
class="td11">                 </td></tr></table></div></div>
<br /> <div class="caption" 
><span class="id">Table&#x00A0;9: </span><span  
class="content">Data types</span></div><!--tex4ht:label?: x27-64001r9 -->
                                                                  

                                                                  
   </div><hr class="endfloat" />
   </div>
     <dl class="description"><dt class="description">
<span 
class="cmbx-10">Type:</span> </dt><dd 
class="description">Synchronous.
     </dd><dt class="description">
<span 
class="cmbx-10">On Entry</span> </dt><dd 
class="description">
     </dd><dt class="description">
<span 
class="cmbx-10">x</span> </dt><dd 
class="description">the local portion of global dense matrix <span 
class="cmmi-10">x</span>. <br 
class="newline" />Scope: <span 
class="cmbx-10">local </span><br 
class="newline" />Type: <span 
class="cmbx-10">required </span><br 
class="newline" />Intent: <span 
class="cmbx-10">in</span>.<br 
class="newline" />Specified   as:   a   rank   one   or   two   array   or   an   object   of   type
     <a 
href="userhtmlsu7.html#vdata"><span 
class="cmtt-10">psb</span><span 
class="cmtt-10">_T</span><span 
class="cmtt-10">_vect</span><span 
class="cmtt-10">_type</span></a>&#x00A0;containing numbers of type specified in Table&#x00A0;<a 
href="#x27-64001r9">9<!--tex4ht:ref: tab:f90nrm2s --></a>.
     </dd><dt class="description">
<span 
class="cmbx-10">desc</span><span 
class="cmbx-10">_a</span> </dt><dd 
class="description">contains data structures for communications.<br 
class="newline" />Scope: <span 
class="cmbx-10">local </span><br 
class="newline" />Type: <span 
class="cmbx-10">required</span><br 
class="newline" />Intent: <span 
class="cmbx-10">in</span>.<br 
class="newline" />Specified as: an object of type <a 
href="userhtmlsu5.html#descdata"><span 
class="cmtt-10">psb</span><span 
class="cmtt-10">_desc</span><span 
class="cmtt-10">_type</span></a>.
     </dd><dt class="description">
<span 
class="cmbx-10">On Return</span> </dt><dd 
class="description">
     </dd><dt class="description">
<span 
class="cmbx-10">res</span> </dt><dd 
class="description">contains the 1-norm of (the columns of) <span 
class="cmmi-10">x</span>.<br 
class="newline" />Scope: <span 
class="cmbx-10">global </span><br 
class="newline" />Intent: <span 
class="cmbx-10">out</span>.<br 
class="newline" />Specified as: a long precision real number.
     </dd><dt class="description">
<span 
class="cmbx-10">info</span> </dt><dd 
class="description">Error code.<br 
class="newline" />Scope: <span 
class="cmbx-10">local </span><br 
class="newline" />Type: <span 
class="cmbx-10">required </span><br 
class="newline" />Intent: <span 
class="cmbx-10">out</span>.<br 
class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
                                                                  

                                                                  
                                                                  

                                                                  
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