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178 lines
7.9 KiB
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178 lines
7.9 KiB
HTML
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<head><title>psb_genrm2s — Generalized 2-Norm of Vector</title>
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<h4 class="subsectionHead"><span class="titlemark">4.9 </span> <a
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id="x27-640004.9"></a>psb_genrm2s — Generalized 2-Norm of Vector</h4>
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<!--l. 727--><p class="noindent" >This subroutine computes a series of 2-norms on the columns of a dense matrix
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<span
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class="cmmi-10">x</span>:
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<center class="math-display" >
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<img
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src="userhtml15x.png" alt="res(i) ← ∥x(:,i)∥2
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" class="math-display" ></center>
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<!--l. 729--><p class="nopar" >
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<div class="verbatim" id="verbatim-48">
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call psb_genrm2s(res, x, desc_a, info)
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</div>
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<!--l. 734--><p class="nopar" >
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<div class="table">
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<!--l. 736--><p class="indent" > <a
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id="x27-640019"></a><hr class="float"><div class="float"
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>
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<div class="center"
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>
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<!--l. 737--><p class="noindent" >
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<div class="tabular"> <table id="TBL-9" class="tabular"
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cellspacing="0" cellpadding="0"
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><colgroup id="TBL-9-1g"><col
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id="TBL-9-1"><col
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id="TBL-9-2"><col
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id="TBL-9-3"></colgroup><tr
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class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-9-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-1-1"
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class="td11"><span
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class="cmmi-10">res </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-1-2"
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class="td11"><span
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class="cmmi-10">x </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-9-1-3"
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class="td11"><span
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class="cmbx-10">Subroutine</span></td></tr><tr
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class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-9-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-1"
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class="td11">Short Precision Real</td><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-2"
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class="td11">Short Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-2-3"
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class="td11">psb_genrm2s</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-9-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-1"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-2"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-3-3"
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class="td11">psb_genrm2s</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-9-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-4-1"
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class="td11">Short Precision Real</td><td style="white-space:nowrap; text-align:left;" id="TBL-9-4-2"
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class="td11">Short Precision Complex</td><td style="white-space:nowrap; text-align:left;" id="TBL-9-4-3"
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class="td11">psb_genrm2s</td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-9-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-5-1"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-5-2"
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class="td11">Long Precision Complex </td><td style="white-space:nowrap; text-align:left;" id="TBL-9-5-3"
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class="td11">psb_genrm2s</td>
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</tr><tr
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class="hline"><td><hr></td><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-9-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-9-6-1"
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class="td11"> </td></tr></table></div></div>
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<br /> <div class="caption"
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><span class="id">Table 9: </span><span
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class="content">Data types</span></div><!--tex4ht:label?: x27-640019 -->
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</div><hr class="endfloat" />
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</div>
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">Type:</span> </dt><dd
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class="description">Synchronous.
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</dd><dt class="description">
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<span
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class="cmbx-10">On Entry</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">x</span> </dt><dd
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class="description">the local portion of global dense matrix <span
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class="cmmi-10">x</span>. <br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required </span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: a rank one or two array or an object of type
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<a
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href="userhtmlsu7.html#vdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_vect</span><span
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class="cmtt-10">_type</span></a> containing numbers of type specified in Table <a
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href="#x27-640019">9<!--tex4ht:ref: tab:f90nrm2s --></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">desc</span><span
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class="cmbx-10">_a</span> </dt><dd
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class="description">contains data structures for communications.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required</span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an object of type <a
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href="userhtmlsu5.html#descdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_desc</span><span
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class="cmtt-10">_type</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">On Return</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">res</span> </dt><dd
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class="description">contains the 1-norm of (the columns of) <span
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class="cmmi-10">x</span>.<br
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class="newline" />Scope: <span
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class="cmbx-10">global </span><br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />Specified as: a long precision real number.
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</dd><dt class="description">
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<span
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class="cmbx-10">info</span> </dt><dd
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class="description">Error code.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required </span><br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
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<!--l. 792--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu22.html" >next</a>] [<a
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href="userhtmlsu17.html" >prev</a>] [<a
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href="userhtmlsu17.html#tailuserhtmlsu17.html" >prev-tail</a>] [<a
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href="userhtmlsu18.html" >front</a>] [<a
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href="userhtmlsu12.html#userhtmlsu21.html" >up</a>] </p></div>
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</body></html>
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