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## mm_array_read -- Read a dense array from a file in the MatrixMarket format

Type:
  Asynchronous.
On Entry
filename
  The name of the file to be read.
  Type:optional.
  Specified as: a character variable containing a valid file name, or `-`, in which case the default input unit 5 (i.e. standard input 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 `-`.

On Return
b
  Rigth hand side(s).
  Type: required
  An array of type real or complex, rank 1 or 2 and having the ALLOCATABLE attribute; will be allocated and filled in if the input file contains a right hand side, otherwise will be left in the UNALLOCATED state.
iret
  Error code.
  Type: required
  An integer value; 0 means no error has been detected.