用R转换日期格式

Question

I am datamining the data from a mobile application, I have a simple problem that is reccurring that is giving me trouble,

Database

UserId         Platform         Date
1              Android          01-01-2016
2              iOS              02/01/2016
3              Android          03-01-2016
4              Android          04-01-2016

As you can see the format of the date is different depending whether the user is on using iOS or Android,

My question, is there a way to transform the Android format date to d/m/y instead of dmy ? Directly in the Date column or by creating a new one,

Thanks a lot

Answer 1

If you want to convert both types of strings directly to a date you could use the dmy() function in the lubridate package.

library(lubridate)

date.vector <- c("01-01-2016", "02/01/2016", "03-01-2016", "04-01-2016")

dmy(date.vector)

# > dmy(date.vector)
# [1] "2016-01-01" "2016-01-02" "2016-01-03" "2016-01-04"

Answer 2

您可以使用gsub将斜杠替换为破折号：

gsub("-", "/", mydata$Date)