Methods for 'is.na'

is.na methods for "timeDate" objects.

Examples

# Create a timeCalendar sequence
(td <- timeCalendar())
#> GMT
#>  [1] [2023-01-01] [2023-02-01] [2023-03-01] [2023-04-01] [2023-05-01]
#>  [6] [2023-06-01] [2023-07-01] [2023-08-01] [2023-09-01] [2023-10-01]
#> [11] [2023-11-01] [2023-12-01]
is.na(td)
#>  [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE

# insert NA's
is.na(td) <- 2:3
td
#> GMT
#>  [1] [2023-01-01] [NA]         [NA]         [2023-04-01] [2023-05-01]
#>  [6] [2023-06-01] [2023-07-01] [2023-08-01] [2023-09-01] [2023-10-01]
#> [11] [2023-11-01] [2023-12-01]

# test of NA's
is.na(td)
#>  [1] FALSE  TRUE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE