Is there a Time-only R class?

Question

Is there a way to store time data in R in a class that only handles time (without dates)? I don\'t need to include dates and I feel it will take up extra memory and visualiz

Answer 1

As my previous comment, here an example of period class from the lubridate package, which I think it might be useful for you. For more information just ?Period-class.

library(lubridate)
t1 <- hm("10:38") 
t1
[1] "10H 38M 0S"
t2 <-  hm("10:39")
t1 - t2
[1] "-1M 0S"

Answer 2

Package data.table has a new class ITime which solves this problem ideally.

library(data.table)
> as.ITime("12:00")-as.ITime("11:10:01")
[1] "00:49:59"