小编Esw*_*war的帖子

dates <- as.Date(dli$Dates)

class(dates)
[1] "Date"

dates
   [1] "2016-01-01" "2016-01-02" "2016-01-03" "2016-01-04" "2016-01-05" "2016-01-06"
   [7] "2016-01-07" "2016-01-08" "2016-01-09" "2016-01-10" "2016-01-11" "2016-01-12"
  [13] "2016-01-13" "2016-01-14" "2016-01-15" "2016-01-16" "2016-01-17" "2016-01-18"
  [19] "2016-01-19" "2016-01-20" "2016-01-21" "2016-01-22" "2016-01-23" "2016-01-24"
  [25] "2016-01-25" "2016-01-26" "2016-01-27" "2016-01-28" "2016-01-29" "2016-01-30"
  [31] "2016-01-31" "2016-02-01" "2016-02-02" "2016-02-03" "2016-02-04" "2016-02-05"
  [37] "2016-02-06" "2016-02-07" "2016-02-08" "2016-02-09" "2016-02-10" "2016-02-11"

这是我的日期格式，所以我需要将其转换为“ 2016-month-day”，我正在获取NA值

dates <- as.Date(dli$Dates,"%d/%b/%Y")

class(dates)
[1] "Date"

dates
   [1] NA NA NA NA NA NA NA NA NA NA NA NA NA NA …