fecfat subject pilltype
    44.5       1        1
     7.3       1        2
     3.4       1        3
    12.4       1        4
    33.0       2        1
    21.0       2        2
    23.1       2        3
    25.4       2        4
    19.1       3        1
     5.0       3        2
    11.8       3        3
    22.0       3        4
     9.4       4        1
     4.6       4        2
     4.6       4        3
     5.8       4        4
    71.3       5        1
    23.3       5        2
    25.6       5        3
    68.2       5        4
    51.2       6        1
    38.0       6        2
    36.0       6        3
    52.6       6        4