Use Generic Functions with Time Windows

tbr_misc(.tbl, x, tcolumn, unit = "years", n, func, ...)

Arguments

.tbl: a data frame with at least two variables; time column formatted as date, date/time and value column.
x: column containing the values the function is applied to.
tcolumn: formatted time column.
unit: character, one of "years", "months", "weeks", "days", "hours", "minutes", "seconds"
n: numeric, describing the length of the time window.
func: specified function
...: optional additional arguments passed to function func

Value

tibble

Examples

tbr_misc(Dissolved_Oxygen, x = Average_DO, tcolumn = Date, unit = "years", n = 5, func = mean)
#> # A tibble: 236 × 9
#>    Station_ID Date       Param_Code Param_Desc         Average_DO Min_DO results
#>         <int> <date>     <chr>      <chr>                   <dbl>  <dbl>   <dbl>
#>  1      12515 2000-01-03 00300      OXYGEN, DISSOLVED…       6.19   6.19    6.19
#>  2      12515 2000-03-14 00300      OXYGEN, DISSOLVED…       6.7    6.7     6.73
#>  3      12517 2000-03-14 00300      OXYGEN, DISSOLVED…       7.3    7.3     6.73
#>  4      12515 2000-03-16 00300      OXYGEN, DISSOLVED…       6.41   6.41    6.65
#>  5      12515 2000-05-03 00300      OXYGEN, DISSOLVED…       4.42   4.42    6.20
#>  6      12517 2000-06-14 00300      OXYGEN, DISSOLVED…       5.74   5.74    6.13
#>  7      12515 2000-06-15 00300      OXYGEN, DISSOLVED…       4.86   4.86    5.95
#>  8      12515 2000-07-11 00300      OXYGEN, DISSOLVED…       4.48   4.48    5.76
#>  9      12515 2000-09-12 00300      OXYGEN, DISSOLVED…       5.64   5.64    5.75
#> 10      12517 2000-10-17 00300      OXYGEN, DISSOLVED…       7.96   7.96    5.97
#> # … with 226 more rows, and 2 more variables: min_date <date>, max_date <date>