CALL SEQUENCE...
       xylin  X Y Z INPUT OUTPUT [ -a VAL1 -b VAL2 -c VAL3
                                   -name VAL4 -npg VAL5 ]
 
 
      AUTHORS - R.Laprise ET J.D.Henderson, MAY 14 1983.
      LAST REVISION: $Header: /home/cvs/RMNLIB/utils/rdiag/lspgm/xylin.ptn,v 4.17 2014/09/25 20:20:56 dugas Exp $
 
 
      DESCRIPTION...
       A CCC FILE ARITHMETIC PROGRAM WHICH...
 
       ... PRODUCES FILE Z = A*X + B*Y + C
           (WHERE BOTH X AND Y MAY CONTAIN REAL OR COMPLEX DATA
            TYPES, BUT THEN C MUST BE 0.0).
 
 
      PARAMETERS...
 
       A    = REAL MULTIPLICATIVE CONSTANT FOR FILE X.
       B    = REAL MULTIPLICATIVE CONSTANT FOR FILE Y.
       C    = REAL ADDITIVE CONSTANT.
       NAME = NEW NAME TO BE GIVEN TO THE OUTPUT RECORDS.
       NPG  = (OPTIONAL) OUTPUT PACKING DENSITY
 
       NOTE: IF **ALL OF** A, B AND C ARE LEFT BLANK (AND NOT 0), 
             THEY ARE THEN SET TO +1.0,+1.0 AND 0.0, RESPECTIVELY.
 
       READ( 5,5010 ) A,B,C,NAME,NPG
 5010  FORMAT(10X,3E10.0.1X.A4,I5)
 
 
      NOTE THAT MISSING VALUE TREATMENT IS SUPPORTED VIA EITHER
      THE "MISSING_VALUE" ENVIRONMENT VARIABLE OR THE "-mvalue"
      COMMAND-LINE ARGUMENT. PLEASE SEE THE R.DIAG WEB
      DOCUMENTAION FOR MORE DETAILS.
 
 
      EXAMPLE OF INPUT CARD...
 
  XLIN          +1.0      -1.0     1000. NAME
 
         0123456789012345678901234567890123456789012345678901234567890
         1         2         3         4         5         6         7
 
 
      EXIT CONDITIONS...
        0 NO PROBLEMS
        1 NOT AS MANY ARRAYS IN FILE Y AS IN FILE X
        2 MORE THAN ONE SIZE FOR ARRAYS IN X AND/OR Y
        3 DATA TYPE IS COMPLEX AND C CONSTANT IS NOT ZERO
        4 ERROR READING INPUT PARAMETERS
        5 UNABLE TO READ FILE X
        6 UNABLE TO READ FILE Y