r - 日期和时间

Question

我读了很多博客，但找不到我的问题的答案:

我有一个日期 2020-25-02 17:45:03，我想将其转换为日期和时间两列。

hello <- strptime(as.character("2020-25-02 17:42:03"),"%Y-%m-%d %H:%M:%S")
df$day <- as.Date(hello, format = "%Y-%d-%m")

但我也想要df$time。这可能吗？

Answer 1

 dtimes = c("2002-06-09 12:45:40","2003-01-29 09:30:40",
+            "2002-09-04 16:45:40","2002-11-13 20:00:40",
+            "2002-07-07 17:30:40")
> dtparts = t(as.data.frame(strsplit(dtimes,' ')))
> row.names(dtparts) = NULL
> thetimes = chron(dates=dtparts[,1],times=dtparts[,2],
+                  format=c('y-m-d','h:m:s'))
> thetimes
[1] (02-06-09 12:45:40) (03-01-29 09:30:40) (02-09-04 16:45:40)
[4] (02-11-13 20:00:40) (02-07-07 17:30:40)

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