R Converting from datetime to date

问题

I have to do a difference between dates and return the number of days. the format of the dates is as follows:

12/9/2011 12:00:00 AM

Does anyone know how to perform the difference without using lubridate?

回答1:

We can use asPOSIXct to convert to DateTime

v1 <- as.POSIXct("12/9/2011 12:00:00 AM", format = "%d/%m/%Y %I:%M:%S %p")

If we need only Date

as.Date(v1)

来源：https://stackoverflow.com/questions/38218240/r-converting-from-datetime-to-date