The following integer constants may make code clearer.
| Constant | Value | Meaning |
valid_years_start | 1000L | The first calendar year for a datey |
valid_years_end | 3000L | The final valid calendar year for a datey (noting that only the start of this year is valid) |
valid_duration_years_max | 2000L | The maximum valid duration in years for a durationy |
Usage
valid_years_start
valid_years_end
valid_duration_years_max
Examples
datey(valid_years_start - 0.001, strict = FALSE)
#> [1] <NA>
datey(valid_years_start)
#> [1] 1000-01-01.0
datey(valid_years_end)
#> [1] 3000-01-01.0
datey(valid_years_end + 0.001, strict = FALSE)
#> [1] <NA>
durationy(-(valid_duration_years_max + 0.001), strict = FALSE)
#> [1] <NA>
