hb_write -- Write a sparse matrix to a file in the Harwell-Boeing format


\begin{lstlisting}
call hb_write(a, iret, iunit, filename, key, rhs, mtitle)
\end{lstlisting}

Type:
Asynchronous.
On Entry
a
the sparse matrix to be written.
Type:required.
Specified as: a structured data of type spdatapsb_Tspmat_type.
b
Rigth hand side.
Type: Optional
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.
filename
The name of the file to be written to.
Type:optional.
Specified as: a character variable containing a valid file name, or -, in which case the default output unit 6 (i.e. standard output in Unix jargon) is used. Default: -.
iunit
The Fortran file unit number.
Type:optional.
Specified as: an integer value. Only meaningful if filename is not -.
key
Matrix key.
Type: Optional
A charachter variable of length 8 holding the matrix key as specified by the Harwell-Boeing format and to be written to file.
mtitle
Matrix title.
Type: Optional
A charachter variable of length 72 holding the matrix title as specified by the Harwell-Boeing format and to be written to file.

On Return
iret
Error code.
Type: required
An integer value; 0 means no error has been detected.