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

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"