如何将数据库工作日名称转换为系统工作日名称

Question

我有一个包含日期和对应星期几的数据库。但是，我想知道是否可以将此数据库的星期几名称更改为系统的工作日名称，也就是说，不是wednesday day，而是Wednesday，这是是在系统中。我相信我必须以某种方式使用wkday 函数

df1 <- structure(
  list(date = c("2021-06-23","2021-06-24","2021-06-30","2021-07-01"),
       Week= c("wednesday day","thursday day","wednesday day","thursday day")),
  class = "data.frame", row.names = c(NA, -4L))

Answer 1

它看起来像这样。 weekdays() 函数用于给出日期并返回星期几。

df1$Week <- weekdays(df1$date)

工作复制：

df1 <- structure(
    list(date = c("2021-06-23","2021-06-24","2021-06-30","2021-07-01"),
         Week= c("wednesday day","thursday day","wednesday day","thursday day")),
         class = "data.frame", row.names = c(NA, -4L))

df1$date <- as.Date(df1$date)

df1$Week <- weekdays(df1$date)

df1