G02BLF Example Program Data
5  4  3  0                 :: N, M, NVARS, MISTYP
 3.0    3.0    1.0    2.0
 6.0    4.0   -1.0    4.0
 9.0    0.0    5.0    9.0
12.0    2.0    0.0    0.0
-1.0    5.0    4.0   12.0  :: End of X
  0      1      0      1   :: MISS
 0.0    0.0    0.0    0.0  :: XMISS
4  1  2                    :: KVAR