[R] Dataframe calculations

Hosack, Michael mhosack at state.pa.us
Fri Mar 19 14:05:18 CET 2010 

Hi everyone,

My question will probably seem simple to most of you, but I
have spent many hours trying to solve it. I need to perform
a series of sequential calculations on my dataframe that move
across rows and down columns, and then repeat themselves at
each unique 'MM' by 'DD' grouping. Specifically, I want to add
'DEPART' time (24 hr time) to 'TRAVEL'(minutes) in line 1 and
put the result in 'ARRIVE' (24 hr time) of line 2, then I want
to add 'WAIT' (minutes) to that 'ARRIVE' time of line 2 to
create 'DEPART', which will then be combined with 'TRAVEL'
(minutes) to yield the 'ARRIVE' time of line 3, etc. This
series of calc's will start anew beginning at each unique 'MM'
by 'DD' grouping. Any advice would be greatly appreciated.

Thank you,

Mike

SCHEDULE2 <-
structure(list(MM = c("05", "05", "05", "05", "05", "05", "05",
"05", "05", "05", "05", "05", "05", "05", "05", "05", "05", "05",
"05", "05", "05", "05", "05", "05", "05", "05", "05", "05", "05",
"05", "05", "05", "05", "05", "05", "05", "05", "05", "05", "05",
"05", "05", "05", "05", "05", "05", "05", "05", "05", "05", "05",
"05", "05", "05", "05", "05", "06", "06", "06", "06", "06", "06",
"06", "06", "06", "06", "06", "06", "06", "06", "06", "06", "06",
"06", "06", "06", "06", "06", "06", "06", "06", "06", "06", "06",
"06", "06", "06", "06", "06", "06", "06", "06", "06", "06", "06",
"06", "06", "06", "06", "06", "06", "06", "06", "06", "06", "06",
"06", "06", "07", "07", "07", "07", "07", "07", "07", "07", "07",
"07", "07", "07", "07", "07", "07", "07", "07", "07", "07", "07",
"07", "07", "07", "07", "07", "07", "07", "07", "07", "07", "07",
"07", "07", "07", "07", "07", "07", "07", "07", "07", "07", "07",
"07", "07", "07", "07", "07", "07", "08", "08", "08", "08", "08",
"08", "08", "08", "08", "08", "08", "08", "08", "08", "08", "08",
"08", "08", "08", "08", "08", "08", "08", "08", "08", "08", "08",
"08", "08", "08", "08", "08", "08", "08", "08", "08", "08", "08",
"08", "08", "08", "08", "08", "08", "08", "08", "08", "08", "08",
"08", "08", "08", "08", "08", "08", "08", "09", "09", "09", "09",
"09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09",
"09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09",
"09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09",
"09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09",
"09", "09", "09", "09", "10", "10", "10", "10", "10", "10", "10",
"10", "10", "10", "10", "10", "10", "10", "10", "10", "10", "10",
"10", "10", "10", "10", "10", "10", "10", "10", "10", "10", "10",
"10", "10", "10", "10", "10", "10", "10", "10", "10", "10", "10",
"10", "10", "10", "10", "10", "10", "10", "10", "10", "10", "10",
"10"), DD = c("02", "02", "02", "02", "03", "03", "03", "03",
"06", "06", "06", "06", "09", "09", "09", "09", "10", "10", "10",
"10", "14", "14", "14", "14", "16", "16", "16", "16", "17", "17",
"17", "17", "19", "19", "19", "19", "22", "22", "22", "22", "24",
"24", "24", "24", "27", "27", "27", "27", "29", "29", "29", "29",
"31", "31", "31", "31", "04", "04", "04", "04", "06", "06", "06",
"06", "07", "07", "07", "07", "10", "10", "10", "10", "12", "12",
"12", "12", "16", "16", "16", "16", "17", "17", "17", "17", "19",
"19", "19", "19", "22", "22", "22", "22", "23", "23", "23", "23",
"27", "27", "27", "27", "28", "28", "28", "28", "29", "29", "29",
"29", "03", "03", "03", "03", "05", "05", "05", "05", "09", "09",
"09", "09", "10", "10", "10", "10", "13", "13", "13", "13", "14",
"14", "14", "14", "18", "18", "18", "18", "22", "22", "22", "22",
"23", "23", "23", "23", "24", "24", "24", "24", "27", "27", "27",
"27", "28", "28", "28", "28", "01", "01", "01", "01", "04", "04",
"04", "04", "06", "06", "06", "06", "07", "07", "07", "07", "12",
"12", "12", "12", "13", "13", "13", "13", "14", "14", "14", "14",
"16", "16", "16", "16", "19", "19", "19", "19", "21", "21", "21",
"21", "23", "23", "23", "23", "24", "24", "24", "24", "28", "28",
"28", "28", "31", "31", "31", "31", "02", "02", "02", "02", "04",
"04", "04", "04", "08", "08", "08", "08", "09", "09", "09", "09",
"11", "11", "11", "11", "14", "14", "14", "14", "16", "16", "16",
"16", "19", "19", "19", "19", "20", "20", "20", "20", "21", "21",
"21", "21", "26", "26", "26", "26", "27", "27", "27", "27", "29",
"29", "29", "29", "03", "03", "03", "03", "05", "05", "05", "05",
"08", "08", "08", "08", "10", "10", "10", "10", "14", "14", "14",
"14", "15", "15", "15", "15", "16", "16", "16", "16", "20", "20",
"20", "20", "21", "21", "21", "21", "24", "24", "24", "24", "26",
"26", "26", "26", "29", "29", "29", "29", "30", "30", "30", "30"
), YEAR = c("2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010", "2010", "2010", "2010",
"2010", "2010", "2010", "2010", "2010"), DOW = c("SUN", "SUN",
"SUN", "SUN", "MON", "MON", "MON", "MON", "THR", "THR", "THR",
"THR", "SUN", "SUN", "SUN", "SUN", "MON", "MON", "MON", "MON",
"FRI", "FRI", "FRI", "FRI", "SUN", "SUN", "SUN", "SUN", "MON",
"MON", "MON", "MON", "WED", "WED", "WED", "WED", "SAT", "SAT",
"SAT", "SAT", "MON", "MON", "MON", "MON", "THR", "THR", "THR",
"THR", "SAT", "SAT", "SAT", "SAT", "MON", "MON", "MON", "MON",
"FRI", "FRI", "FRI", "FRI", "SUN", "SUN", "SUN", "SUN", "MON",
"MON", "MON", "MON", "THR", "THR", "THR", "THR", "SAT", "SAT",
"SAT", "SAT", "WED", "WED", "WED", "WED", "THR", "THR", "THR",
"THR", "SAT", "SAT", "SAT", "SAT", "TUE", "TUE", "TUE", "TUE",
"WED", "WED", "WED", "WED", "SUN", "SUN", "SUN", "SUN", "MON",
"MON", "MON", "MON", "TUE", "TUE", "TUE", "TUE", "SAT", "SAT",
"SAT", "SAT", "MON", "MON", "MON", "MON", "FRI", "FRI", "FRI",
"FRI", "SAT", "SAT", "SAT", "SAT", "TUE", "TUE", "TUE", "TUE",
"WED", "WED", "WED", "WED", "SUN", "SUN", "SUN", "SUN", "THR",
"THR", "THR", "THR", "FRI", "FRI", "FRI", "FRI", "SAT", "SAT",
"SAT", "SAT", "TUE", "TUE", "TUE", "TUE", "WED", "WED", "WED",
"WED", "SUN", "SUN", "SUN", "SUN", "WED", "WED", "WED", "WED",
"FRI", "FRI", "FRI", "FRI", "SAT", "SAT", "SAT", "SAT", "THR",
"THR", "THR", "THR", "FRI", "FRI", "FRI", "FRI", "SAT", "SAT",
"SAT", "SAT", "MON", "MON", "MON", "MON", "THR", "THR", "THR",
"THR", "SAT", "SAT", "SAT", "SAT", "MON", "MON", "MON", "MON",
"TUE", "TUE", "TUE", "TUE", "SAT", "SAT", "SAT", "SAT", "TUE",
"TUE", "TUE", "TUE", "THR", "THR", "THR", "THR", "SAT", "SAT",
"SAT", "SAT", "WED", "WED", "WED", "WED", "THR", "THR", "THR",
"THR", "SAT", "SAT", "SAT", "SAT", "TUE", "TUE", "TUE", "TUE",
"THR", "THR", "THR", "THR", "SUN", "SUN", "SUN", "SUN", "MON",
"MON", "MON", "MON", "TUE", "TUE", "TUE", "TUE", "SUN", "SUN",
"SUN", "SUN", "MON", "MON", "MON", "MON", "WED", "WED", "WED",
"WED", "SUN", "SUN", "SUN", "SUN", "TUE", "TUE", "TUE", "TUE",
"FRI", "FRI", "FRI", "FRI", "SUN", "SUN", "SUN", "SUN", "THR",
"THR", "THR", "THR", "FRI", "FRI", "FRI", "FRI", "SAT", "SAT",
"SAT", "SAT", "WED", "WED", "WED", "WED", "THR", "THR", "THR",
"THR", "SUN", "SUN", "SUN", "SUN", "TUE", "TUE", "TUE", "TUE",
"FRI", "FRI", "FRI", "FRI", "SAT", "SAT", "SAT", "SAT"), DTYPE = c(2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L), WEEK = c(1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11,
11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15,
15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17,
18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20,
20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23,
23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24,
24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27
), TOD = c(2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L),
    SITE1 = c(101, 102, 103, 104, 103, 104, 101, 102, 101, 102,
    103, 104, 101, 102, 103, 104, 103, 104, 101, 102, 103, 104,
    101, 102, 102, 103, 104, 101, 101, 102, 103, 104, 102, 103,
    104, 101, 103, 104, 101, 102, 103, 104, 101, 102, 103, 104,
    101, 102, 104, 101, 102, 103, 102, 103, 104, 101, 104, 101,
    102, 103, 101, 102, 103, 104, 104, 101, 102, 103, 103, 104,
    101, 102, 103, 104, 101, 102, 102, 103, 104, 101, 101, 102,
    103, 104, 102, 103, 104, 101, 103, 104, 101, 102, 101, 102,
    103, 104, 103, 104, 101, 102, 103, 104, 101, 102, 104, 101,
    102, 103, 103, 104, 101, 102, 101, 102, 103, 104, 101, 102,
    103, 104, 103, 104, 101, 102, 102, 103, 104, 101, 103, 104,
    101, 102, 104, 101, 102, 103, 103, 104, 101, 102, 101, 102,
    103, 104, 103, 104, 101, 102, 103, 104, 101, 102, 103, 104,
    101, 102, 101, 102, 103, 104, 104, 101, 102, 103, 101, 102,
    103, 104, 104, 101, 102, 103, 103, 104, 101, 102, 102, 103,
    104, 101, 103, 104, 101, 102, 102, 103, 104, 101, 102, 103,
    104, 101, 104, 101, 102, 103, 101, 102, 103, 104, 103, 104,
    101, 102, 103, 104, 101, 102, 102, 103, 104, 101, 101, 102,
    103, 104, 104, 101, 102, 103, 104, 101, 102, 103, 101, 102,
    103, 104, 104, 101, 102, 103, 103, 104, 101, 102, 102, 103,
    104, 101, 102, 103, 104, 101, 103, 104, 101, 102, 104, 101,
    102, 103, 101, 102, 103, 104, 103, 104, 101, 102, 104, 101,
    102, 103, 103, 104, 101, 102, 101, 102, 103, 104, 104, 101,
    102, 103, 103, 104, 101, 102, 103, 104, 101, 102, 101, 102,
    103, 104, 102, 103, 104, 101, 103, 104, 101, 102, 104, 101,
    102, 103, 103, 104, 101, 102, 101, 102, 103, 104, 104, 101,
    102, 103, 103, 104, 101, 102), ARRIVE = c("14:30:00", "0",
    "0", "0", "07:00:00", "0", "0", "0", "07:00:00", "0", "0",
    "0", "14:30:00", "0", "0", "0", "07:00:00", "0", "0", "0",
    "07:00:00", "0", "0", "0", "07:00:00", "0", "0", "0", "07:00:00",
    "0", "0", "0", "14:30:00", "0", "0", "0", "07:00:00", "0",
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    100, 60, 60, 60, 100, 100, 60, 100, 60, 60, 100, 100, 100,
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    100, 60, 60, 100, 100, 60, 100, 100, 60, 100, 100, 60, 60,
    60, 100, 100, 60, 100, 60, 60, 100, 100, 100, 60, 60, 60,
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    35, 50, 30, 35, 50, 30, 10, 50, 30, 10, 35, 35, 50, 30, 10,
    30, 10, 35, 50, 50, 30, 10, 35, 35, 50, 30, 10)), .Names = c("MM",
"DD", "YEAR", "DOW", "DTYPE", "WEEK", "TOD", "SITE1", "ARRIVE",
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"522", "523", "51", "511", "513", "515", "79", "791", "792",
"793"), class = "data.frame")

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