Replace date or time values by the first of the period. tsbox usually relies on timestamps being the first value of a period.
Value
a ts-boxable object of the same class as x, i.e., an object of
class ts, xts, zoo, zooreg, data.frame, data.table, tbl,
tbl_ts, tbl_time, tis, irts or timeSeries.
Examples
x <- ts_c(
a = ts_lag(ts_df(mdeaths), "14 days"),
b = ts_lag(ts_df(mdeaths), "-2 days")
)
ts_first_of_period(x)
#> id time value
#> 1 a 1974-01-01 2134
#> 2 a 1974-02-01 1863
#> 3 a 1974-03-01 1877
#> 4 a 1974-04-01 1877
#> 5 a 1974-05-01 1492
#> 6 a 1974-06-01 1249
#> 7 a 1974-07-01 1280
#> 8 a 1974-08-01 1131
#> 9 a 1974-09-01 1209
#> 10 a 1974-10-01 1492
#> 11 a 1974-11-01 1621
#> 12 a 1974-12-01 1846
#> 13 a 1975-01-01 2103
#> 14 a 1975-02-01 2137
#> 15 a 1975-03-01 2153
#> 16 a 1975-04-01 1833
#> 17 a 1975-05-01 1403
#> 18 a 1975-06-01 1288
#> 19 a 1975-07-01 1186
#> 20 a 1975-08-01 1133
#> 21 a 1975-09-01 1053
#> 22 a 1975-10-01 1347
#> 23 a 1975-11-01 1545
#> 24 a 1975-12-01 2066
#> 25 a 1976-01-01 2020
#> 26 a 1976-02-01 2750
#> 27 a 1976-03-01 2283
#> 28 a 1976-04-01 1479
#> 29 a 1976-05-01 1189
#> 30 a 1976-06-01 1160
#> 31 a 1976-07-01 1113
#> 32 a 1976-08-01 970
#> 33 a 1976-09-01 999
#> 34 a 1976-10-01 1208
#> 35 a 1976-11-01 1467
#> 36 a 1976-12-01 2059
#> 37 a 1977-01-01 2240
#> 38 a 1977-02-01 1634
#> 39 a 1977-03-01 1722
#> 40 a 1977-04-01 1801
#> 41 a 1977-05-01 1246
#> 42 a 1977-06-01 1162
#> 43 a 1977-07-01 1087
#> 44 a 1977-08-01 1013
#> 45 a 1977-09-01 959
#> 46 a 1977-10-01 1179
#> 47 a 1977-11-01 1229
#> 48 a 1977-12-01 1655
#> 49 a 1978-01-01 2019
#> 50 a 1978-02-01 2284
#> 51 a 1978-03-01 1942
#> 52 a 1978-04-01 1423
#> 53 a 1978-05-01 1340
#> 54 a 1978-06-01 1187
#> 55 a 1978-07-01 1098
#> 56 a 1978-08-01 1004
#> 57 a 1978-09-01 970
#> 58 a 1978-10-01 1140
#> 59 a 1978-11-01 1110
#> 60 a 1978-12-01 1812
#> 61 a 1979-01-01 2263
#> 62 a 1979-02-01 1820
#> 63 a 1979-03-01 1846
#> 64 a 1979-04-01 1531
#> 65 a 1979-05-01 1215
#> 66 a 1979-06-01 1075
#> 67 a 1979-07-01 1056
#> 68 a 1979-08-01 975
#> 69 a 1979-09-01 940
#> 70 a 1979-10-01 1081
#> 71 a 1979-11-01 1294
#> 72 a 1979-12-01 1341
#> 73 b 1973-12-01 2134
#> 74 b 1974-01-01 1863
#> 75 b 1974-02-01 1877
#> 76 b 1974-03-01 1877
#> 77 b 1974-04-01 1492
#> 78 b 1974-05-01 1249
#> 79 b 1974-06-01 1280
#> 80 b 1974-07-01 1131
#> 81 b 1974-08-01 1209
#> 82 b 1974-09-01 1492
#> 83 b 1974-10-01 1621
#> 84 b 1974-11-01 1846
#> 85 b 1974-12-01 2103
#> 86 b 1975-01-01 2137
#> 87 b 1975-02-01 2153
#> 88 b 1975-03-01 1833
#> 89 b 1975-04-01 1403
#> 90 b 1975-05-01 1288
#> 91 b 1975-06-01 1186
#> 92 b 1975-07-01 1133
#> 93 b 1975-08-01 1053
#> 94 b 1975-09-01 1347
#> 95 b 1975-10-01 1545
#> 96 b 1975-11-01 2066
#> 97 b 1975-12-01 2020
#> 98 b 1976-01-01 2750
#> 99 b 1976-02-01 2283
#> 100 b 1976-03-01 1479
#> 101 b 1976-04-01 1189
#> 102 b 1976-05-01 1160
#> 103 b 1976-06-01 1113
#> 104 b 1976-07-01 970
#> 105 b 1976-08-01 999
#> 106 b 1976-09-01 1208
#> 107 b 1976-10-01 1467
#> 108 b 1976-11-01 2059
#> 109 b 1976-12-01 2240
#> 110 b 1977-01-01 1634
#> 111 b 1977-02-01 1722
#> 112 b 1977-03-01 1801
#> 113 b 1977-04-01 1246
#> 114 b 1977-05-01 1162
#> 115 b 1977-06-01 1087
#> 116 b 1977-07-01 1013
#> 117 b 1977-08-01 959
#> 118 b 1977-09-01 1179
#> 119 b 1977-10-01 1229
#> 120 b 1977-11-01 1655
#> 121 b 1977-12-01 2019
#> 122 b 1978-01-01 2284
#> 123 b 1978-02-01 1942
#> 124 b 1978-03-01 1423
#> 125 b 1978-04-01 1340
#> 126 b 1978-05-01 1187
#> 127 b 1978-06-01 1098
#> 128 b 1978-07-01 1004
#> 129 b 1978-08-01 970
#> 130 b 1978-09-01 1140
#> 131 b 1978-10-01 1110
#> 132 b 1978-11-01 1812
#> 133 b 1978-12-01 2263
#> 134 b 1979-01-01 1820
#> 135 b 1979-02-01 1846
#> 136 b 1979-03-01 1531
#> 137 b 1979-04-01 1215
#> 138 b 1979-05-01 1075
#> 139 b 1979-06-01 1056
#> 140 b 1979-07-01 975
#> 141 b 1979-08-01 940
#> 142 b 1979-09-01 1081
#> 143 b 1979-10-01 1294
#> 144 b 1979-11-01 1341
ts_first_of_period(ts_lag(ts_df(austres), "14 days"))
#> time value
#> 1 1971-04-01 13067.3
#> 2 1971-07-01 13130.5
#> 3 1971-10-01 13198.4
#> 4 1972-01-01 13254.2
#> 5 1972-04-01 13303.7
#> 6 1972-07-01 13353.9
#> 7 1972-10-01 13409.3
#> 8 1973-01-01 13459.2
#> 9 1973-04-01 13504.5
#> 10 1973-07-01 13552.6
#> 11 1973-10-01 13614.3
#> 12 1974-01-01 13669.5
#> 13 1974-04-01 13722.6
#> 14 1974-07-01 13772.1
#> 15 1974-10-01 13832.0
#> 16 1975-01-01 13862.6
#> 17 1975-04-01 13893.0
#> 18 1975-07-01 13926.8
#> 19 1975-10-01 13968.9
#> 20 1976-01-01 14004.7
#> 21 1976-04-01 14033.1
#> 22 1976-07-01 14066.0
#> 23 1976-10-01 14110.1
#> 24 1977-01-01 14155.6
#> 25 1977-04-01 14192.2
#> 26 1977-07-01 14231.7
#> 27 1977-10-01 14281.5
#> 28 1978-01-01 14330.3
#> 29 1978-04-01 14359.3
#> 30 1978-07-01 14396.6
#> 31 1978-10-01 14430.8
#> 32 1979-01-01 14478.4
#> 33 1979-04-01 14515.7
#> 34 1979-07-01 14554.9
#> 35 1979-10-01 14602.5
#> 36 1980-01-01 14646.4
#> 37 1980-04-01 14695.4
#> 38 1980-07-01 14746.6
#> 39 1980-10-01 14807.4
#> 40 1981-01-01 14874.4
#> 41 1981-04-01 14923.3
#> 42 1981-07-01 14988.7
#> 43 1981-10-01 15054.1
#> 44 1982-01-01 15121.7
#> 45 1982-04-01 15184.2
#> 46 1982-07-01 15239.3
#> 47 1982-10-01 15288.9
#> 48 1983-01-01 15346.2
#> 49 1983-04-01 15393.5
#> 50 1983-07-01 15439.0
#> 51 1983-10-01 15483.5
#> 52 1984-01-01 15531.5
#> 53 1984-04-01 15579.4
#> 54 1984-07-01 15628.5
#> 55 1984-10-01 15677.3
#> 56 1985-01-01 15736.7
#> 57 1985-04-01 15788.3
#> 58 1985-07-01 15839.7
#> 59 1985-10-01 15900.6
#> 60 1986-01-01 15961.5
#> 61 1986-04-01 16018.3
#> 62 1986-07-01 16076.9
#> 63 1986-10-01 16139.0
#> 64 1987-01-01 16203.0
#> 65 1987-04-01 16263.3
#> 66 1987-07-01 16327.9
#> 67 1987-10-01 16398.9
#> 68 1988-01-01 16478.3
#> 69 1988-04-01 16538.2
#> 70 1988-07-01 16621.6
#> 71 1988-10-01 16697.0
#> 72 1989-01-01 16777.2
#> 73 1989-04-01 16833.1
#> 74 1989-07-01 16891.6
#> 75 1989-10-01 16956.8
#> 76 1990-01-01 17026.3
#> 77 1990-04-01 17085.4
#> 78 1990-07-01 17106.9
#> 79 1990-10-01 17169.4
#> 80 1991-01-01 17239.4
#> 81 1991-04-01 17292.0
#> 82 1991-07-01 17354.2
#> 83 1991-10-01 17414.2
#> 84 1992-01-01 17447.3
#> 85 1992-04-01 17482.6
#> 86 1992-07-01 17526.0
#> 87 1992-10-01 17568.7
#> 88 1993-01-01 17627.1
#> 89 1993-04-01 17661.5