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166 lines
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<H2><A NAME="SECTION000102000000000000000">
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hb_write -- Write a sparse matrix to a file
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in the Harwell-Boeing format</A>
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</H2>
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<P>
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<PRE>
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call hb_write(a, iret, iunit, filename, key, rhs, mtitle)
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</PRE>
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<P>
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Asynchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>a</STRONG></DT>
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<DD>the sparse matrix to be written.
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<BR>
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Type:<B>required</B>.
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<BR>
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Specified as: a structured data of type spdata<TT>psb_spmat_type</TT>.
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</DD>
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<DT><STRONG>b</STRONG></DT>
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<DD>Rigth hand side.
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<BR>
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Type: <B>Optional</B>
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<BR>
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An array of type real or complex, rank 1 and having the ALLOCATABLE
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attribute; will be allocated and filled in if the input file contains
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a right hand side.
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</DD>
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<DT><STRONG>filename</STRONG></DT>
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<DD>The name of the file to be written to.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: a character variable containing a valid file name, or
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<code>-</code>, in which case the default output unit 6 (i.e. standard output
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in Unix jargon) is used. Default: <code>-</code>.
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</DD>
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<DT><STRONG>iunit</STRONG></DT>
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<DD>The Fortran file unit number.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
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</DD>
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<DT><STRONG>key</STRONG></DT>
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<DD>Matrix key.
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<BR>
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Type: <B>Optional</B>
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<BR>
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A charachter variable of length 8 holding the
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matrix key as specified by the Harwell-Boeing format and to be
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written to file.
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</DD>
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<DT><STRONG>mtitle</STRONG></DT>
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<DD>Matrix title.
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<BR>
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Type: <B>Optional</B>
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<BR>
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A charachter variable of length 72 holding the
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matrix title as specified by the Harwell-Boeing format and to be
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written to file.
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</DD>
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</DL>
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<P>
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<DL>
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>iret</STRONG></DT>
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<DD>Error code.
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<BR>
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Type: <B>required</B>
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<BR>
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An integer value; 0 means no error has been detected.
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</DD>
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