我有一個包含日期和相??應日期的資料庫。但是，我想知道是否可以將這個資料庫的星期幾名稱更改為系統的作業日名稱，即，而不是wednesday day它Wednesday，這是系統中的形式。我相信我必須以wkday某種方式使用該功能
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))
uj5u.com熱心網友回復：
它看起來像這樣。該weekdays()函式用于給出日期并回傳星期幾。
df1$Week <- weekdays(df1$date)
作業再現：
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
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/390439.html
標籤：r
上一篇：FUN引數中的乘法
下一篇：R函式按觀察年份劃分人-時間