Convert numeric dates for month, day, and year to Date object, and vice versa.
mdy.Date(month, day, year, yearcut = 120) Date.mdy(date) is.Date(x)
| month | integer, month (1-12). |
|---|---|
| day | integer, day of the month (1-31, depending on the month). |
| year | integer, either 2- or 4-digit year. If two-digit number, will add 1900 onto it, depending on range. |
| yearcut | cutoff for method to know if to convert to 4-digit year. |
| date | A date value. |
| x | An object. |
mdy.Date returns a Date object, and Date.mdy returns a list with integer values for month, day, and year.
is.Date returns a single logical value.
Test if an object is a date.
More work may need to be done with yearcut and 2-digit years. Best to give a full 4-digit year.
mdy.Date(9, 2, 2013)#> [1] "2013-09-02"tmp <- mdy.Date(9, 2, 2013) Date.mdy(tmp)#> $month #> [1] 9 #> #> $day #> [1] 2 #> #> $year #> [1] 2013 #>is.Date(tmp)#> [1] TRUE