我在 R 中处理数据格式方面没有经验，而且我正在努力理解四月一日的不同行为......这是愚人节吗？？:)
它们具有相同的格式，但似乎无法使用 as.POSIXct 解析第一天（当其他日期显示没有问题时）或者它不使用 as.POSIXlt 返回时区？
(as.POSIXct("1/04/2012 02:58", format = "%d/%m/%Y %H:%M")) # this doesn't work
(as.POSIXct("2/04/2012 02:58", format = "%d/%m/%Y %H:%M")) # this works
(as.POSIXct("01/04/2012 02:58", format = "%d/%m/%Y %H:%M")) # this doesn't
(as.POSIXct("02/04/2012 02:58", format = "%d/%m/%Y %H:%M")) # this does...
(as.POSIXlt("1/04/2012 02:58", format = "%d/%m/%Y %H:%M")) # This works, but does not returns a time zone
(as.POSIXlt("2/04/2012 02:58", format = "%d/%m/%Y %H:%M")) # This works, and returns a time zone
(as.POSIXlt("01/04/2012 02:58", format = "%d/%m/%Y …