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<h4 class="subsectionHead"><span class="titlemark">9.2 </span> <a
id="x93-1300009.2"></a>hb_write &#8212; Write a sparse matrix to a file in the Harwell&#8211;Boeing
format</h4>
<!--l. 59-->
<div class="lstlisting" id="listing-11"><span class="label"><a
id="x93-130001r1"></a></span><span
class="cmtt-10">call</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">hb_write</span><span
class="cmtt-10">(</span><span
class="cmtt-10">a</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">iret</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">iunit</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">filename</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">key</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">rhs</span><span
class="cmtt-10">,</span><span
class="cmtt-10">&#x00A0;</span><span
class="cmtt-10">mtitle</span><span
class="cmtt-10">)</span>
</div>
<!--l. 65--><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">a</span> </dt><dd
class="description">the sparse matrix to be written.<br
class="newline" />Type:<span
class="cmbx-10">required</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">b</span> </dt><dd
class="description">Rigth hand side.<br
class="newline" />Type: <span
class="cmbx-10">Optional </span><br
class="newline" />An array of type real or complex, rank 1 and having the ALLOCATABLE
attribute; will be allocated and filled in if the input file contains a right
hand side.
</dd><dt class="description">
<span
class="cmbx-10">filename</span> </dt><dd
class="description">The name of the file to be written to.<br
class="newline" />Type:<span
class="cmbx-10">optional</span>.<br
class="newline" />Specified as: a character variable containing a valid file name, or <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">-</span></span></span>, in
which case the default output unit 6 (i.e. standard output in Unix jargon)
is used. Default: <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">-</span></span></span>.
</dd><dt class="description">
<span
class="cmbx-10">iunit</span> </dt><dd
class="description">The Fortran file unit number.<br
class="newline" />Type:<span
class="cmbx-10">optional</span>.<br
class="newline" />Specified as: an integer value. Only meaningful if filename is not <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">-</span></span></span>.
</dd><dt class="description">
<span
class="cmbx-10">key</span> </dt><dd
class="description">Matrix key.<br
class="newline" />Type: <span
class="cmbx-10">Optional </span><br
class="newline" />A charachter variable of length 8 holding the matrix key as specified by
the Harwell-Boeing format and to be written to file.
</dd><dt class="description">
<span
class="cmbx-10">mtitle</span> </dt><dd
class="description">Matrix title.<br
class="newline" />Type: <span
class="cmbx-10">Optional </span><br
class="newline" />A charachter variable of length 72 holding the matrix title as specified by
the Harwell-Boeing format and to be written to file.</dd></dl>
<!--l. 96--><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">iret</span> </dt><dd
class="description">Error code.<br
class="newline" />Type: <span
class="cmbx-10">required </span><br
class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
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