<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html > <head><title>psb_sp_getrow — Extract row(s) from a sparse matrix</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="generator" content="TeX4ht (https://tug.org/tex4ht/)"> <meta name="originator" content="TeX4ht (https://tug.org/tex4ht/)"> <!-- html,3 --> <meta name="src" content="userhtml.tex"> <link rel="stylesheet" type="text/css" href="userhtml.css"> </head><body > <!--l. 1596--><div class="crosslinks"><p class="noindent">[<a href="userhtmlsu57.html" >next</a>] [<a href="userhtmlsu53.html" >prev</a>] [<a href="userhtmlsu53.html#tailuserhtmlsu53.html" >prev-tail</a>] [<a href="userhtmlsu51.html#tailuserhtmlsu54.html">tail</a>] [<a href="userhtmlsu32.html#userhtmlse7.html" >up</a>] </p></div> <h4 class="subsectionHead"><span class="titlemark">6.25 </span> <a id="x65-1020006.25"></a>psb_sp_getrow — Extract row(s) from a sparse matrix</h4> <pre class="verbatim" id="verbatim-58"> call psb_sp_getrow(row, a, nz, ia, ja, val, info, &               & append, nzin, lrw) </pre> <!--l. 1602--><p class="nopar" > <!--l. 1604--><p class="indent" > <dl class="description"><dt class="description"> <span class="cmbx-10">Type:</span> </dt><dd class="description">Asynchronous. </dd><dt class="description"> <span class="cmbx-10">On Entry</span> </dt><dd class="description"> </dd><dt class="description"> <span class="cmbx-10">row</span> </dt><dd class="description">The (first) row to be extracted.<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 integer <span class="cmmi-10">> </span>0. </dd><dt class="description"> <span class="cmbx-10">a</span> </dt><dd class="description">the matrix from which to get rows.<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 structured data of type <a href="userhtmlsu6.html#spdata"><span class="cmtt-10">psb</span><span class="cmtt-10">_Tspmat</span><span class="cmtt-10">_type</span></a>. </dd><dt class="description"> <span class="cmbx-10">append</span> </dt><dd class="description">Whether to append or overwrite existing output.<br class="newline" />Scope:<span class="cmbx-10">local</span><br class="newline" />Type:<span class="cmbx-10">optional</span><br class="newline" />Intent: <span class="cmbx-10">in</span>.<br class="newline" />Specified as: a logical value default: false (overwrite). </dd><dt class="description"> <span class="cmbx-10">nzin</span> </dt><dd class="description">Input size to be appended to.<br class="newline" />Scope:<span class="cmbx-10">local</span><br class="newline" />Type:<span class="cmbx-10">optional</span><br class="newline" />Intent: <span class="cmbx-10">in</span>.<br class="newline" />Specified as: an integer <span class="cmmi-10">> </span>0. When append is true, specifies how many entries in the output vectors are already filled. </dd><dt class="description"> <span class="cmbx-10">lrw</span> </dt><dd class="description">The last row to be extracted.<br class="newline" />Scope:<span class="cmbx-10">local</span><br class="newline" />Type:<span class="cmbx-10">optional</span><br class="newline" />Intent: <span class="cmbx-10">in</span>.<br class="newline" />Specified as: an integer <span class="cmmi-10">> </span>0, default: <span class="cmmi-10">row</span>. </dd></dl> <!--l. 1644--><p class="indent" > <dl class="description"><dt class="description"> <span class="cmbx-10">On Return</span> </dt><dd class="description"> </dd><dt class="description"> <span class="cmbx-10">nz</span> </dt><dd class="description">the number of elements returned by this call.<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" />Returned as: an integer scalar. </dd><dt class="description"> <span class="cmbx-10">ia</span> </dt><dd class="description">the row indices.<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">inout</span>.<br class="newline" />Specified as: an integer array with the <span class="obeylines-h"><span class="verb"><span class="cmtt-10">ALLOCATABLE</span></span></span> attribute. </dd><dt class="description"> <span class="cmbx-10">ja</span> </dt><dd class="description">the column indices of the elements to be inserted.<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">inout</span>.<br class="newline" />Specified as: an integer array with the <span class="obeylines-h"><span class="verb"><span class="cmtt-10">ALLOCATABLE</span></span></span> attribute. </dd><dt class="description"> <span class="cmbx-10">val</span> </dt><dd class="description">the elements to be inserted.<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">inout</span>.<br class="newline" />Specified as: a real array with the <span class="obeylines-h"><span class="verb"><span class="cmtt-10">ALLOCATABLE</span></span></span> attribute. </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> <!--l. 1673--><p class="noindent" ><span class="cmbx-12">Notes</span> <ol class="enumerate1" > <li class="enumerate" id="x65-102002x1">The output <span class="cmmi-10">nz </span>is always the size of the output generated by the current call; thus, if <span class="obeylines-h"><span class="verb"><span class="cmtt-10">append=.true.</span></span></span>, the total output size will be <span class="cmmi-10">nzin </span>+ <span class="cmmi-10">nz</span>, with the newly extracted coefficients stored in entries <span class="obeylines-h"><span class="verb"><span class="cmtt-10">nzin+1:nzin+nz</span></span></span> of the array arguments; </li> <li class="enumerate" id="x65-102004x2">When <span class="obeylines-h"><span class="verb"><span class="cmtt-10">append=.true.</span></span></span> the output arrays are reallocated as necessary; </li> <li class="enumerate" id="x65-102006x3">The row and column indices are returned in the local numbering scheme; if the global numbering is desired, the user may employ the <span class="obeylines-h"><span class="verb"><span class="cmtt-10">psb_loc_to_glob</span></span></span> routine on the output.</li></ol> <!--l. 1689--><div class="crosslinks"><p class="noindent">[<a href="userhtmlsu57.html" >next</a>] [<a href="userhtmlsu53.html" >prev</a>] [<a href="userhtmlsu53.html#tailuserhtmlsu53.html" >prev-tail</a>] [<a href="userhtmlsu54.html" >front</a>] [<a href="userhtmlsu32.html#userhtmlse7.html" >up</a>] </p></div> <!--l. 1689--><p class="indent" > <a id="tailuserhtmlsu54.html"></a> </body></html>