Round a POSIX date (POSIXct) with base R functionality

Question

I\'m currently playing around a lot with dates and times for a package I\'m building.

Stumbling across this post reminded me again that it\'s generally not a bad ide

Answer 1

base has round.POSIXt to do this. Not sure why it doesn't come up with methods.

x <- as.POSIXct(Sys.time())
x
[1] "2012-07-04 10:01:08 BST"
round(x,"mins")
[1] "2012-07-04 10:01:00 BST"
round(x,"hours")
[1] "2012-07-04 10:00:00 BST"
round(x,"days")
[1] "2012-07-04"