SUBROUTINE  PLTSS (Z1,ZE,Z2,NX,MX,NY)

C     [SOUTHERN STEREOPAIR]
C     PROGRAM TO PRODUCE TWO PERSPECTIVE DRAWINGS OF A FUNCTION
C     DEFINED IN A RECTANGULAR ARRAY.  THE DRAWINGS ARE OFFSET
C     IN A MANNER SUITABLE FOR THEIR USE AS A STEREOPAIR.
C     ZE     ARRAY OF FUNCTION VALUES
C     Z1,Z2  RANGE OF FUNCTION VALUES
C     NX     ACTUAL  LENGTH OF COLUMNS
C     MX     MAXIMUM LENGTH OF COLUMNS
C     NY     ACTUAL  LENGTH OF ROWS
C     [06-OCT-74]

      EXTERNAL    PLTLH,PLTRH
      DIMENSION   ZE(1)

      CALL PLTFR
      CALL VISNH
      CALL VISDS (Z1,ZE,Z2,1,NX,MX,1,NY,NY,0.1,0.25,-1,1,PLTLH)
      CALL VISNH
      CALL VISDS (Z1,ZE,Z2,1,NX,MX,1,NY,NY,0.1,0.25, 1,1,PLTRH)
      CALL PLTEJ
      RETURN

      END