从 R 中的日期时间中提取月份和年份

Question

假设我有这个示例 df 数据集

Order.Date       
2011-10-20       
2011-12-25       
2012-04-15      
2012-08-23       
2013-09-25       

我想提取月份和年份，就像这样

Order.Date       Month       Year
2011-10-20       October     2011
2011-12-25       December    2011
2012-04-15       April       2012
2012-08-23       August      2012
2013-09-25       September   2013

有什么解决办法吗？任何东西，可以使用 lubridate 或任何东西

Answer 1

lubridate month并且year会起作用。

as.data.frame(Order.Date) %>%
  mutate(Month = lubridate::month(Order.Date, label = FALSE),
         Year = lubridate::year(Order.Date))

  Order.Date Month Year
1 2011-10-20    10 2011
2 2011-12-25    12 2011
3 2012-04-15     4 2012
4 2012-08-23     8 2012
5 2013-09-25     9 2013

如果您希望月份格式为Jan，请使用month.abb和 as January，请使用month.name

as.data.frame(Order.Date) %>%
  mutate(Month = month.abb[lubridate::month(Order.Date, label = TRUE)],
         Year = lubridate::year(Order.Date))

  Order.Date Month Year
1 2011-10-20   Oct 2011
2 2011-12-25   Dec 2011
3 2012-04-15   Apr 2012
4 2012-08-23   Aug 2012
5 2013-09-25   Sep 2013

as.data.frame(Order.Date) %>%
  mutate(Month = month.name[lubridate::month(Order.Date, label = TRUE)],
         Year = lubridate::year(Order.Date))

  Order.Date     Month Year
1 2011-10-20   October 2011
2 2011-12-25  December 2011
3 2012-04-15     April 2012
4 2012-08-23    August 2012
5 2013-09-25 September 2013