hms

Overview

The hms package provides a simple class for storing durations or time-of-day values and displaying them in the hh:mm:ss format. This class is intended to simplify data exchange with databases, spreadsheets, and other data sources:

• Stores values as a numeric vector that contains the number of seconds since midnight
• Supports construction from explicit hour, minute, or second values
• Supports coercion to and from various data types, including POSIXt
• Can be used as column in a data frame
• Based on the difftime class
• Values can exceed the 24-hour boundary or be negative
• By default, fractional seconds up to a microsecond are displayed, regardless of the value of the "digits.secs" option

Installation

# The easiest way to get hms is to install the whole tidyverse:
install.packages("tidyverse")

# Alternatively, install just hms:
install.packages("hms")

# Or the the development version from GitHub:
# install.packages("devtools")
devtools::install_github("tidyverse/hms")

Usage

The following example showcases ways of using the hms class standalone or as a data frame column.

library(hms)
hms(56, 34, 12)
#> 12:34:56
as.hms(1)
#> 00:00:01
as.hms("12:34:56")
#> 12:34:56
as.hms(Sys.time())
#> 16:45:12.828186
as.POSIXct(hms(1))
#> [1] "1970-01-01 00:00:01 UTC"

data.frame(hours = 1:3, hms = hms(hours = 1:3))
#>   hours      hms
#> 1     1 01:00:00
#> 2     2 02:00:00
#> 3     3 03:00:00