hms {hms}R Documentation

A simple class for storing time-of-day values

Description

The values are stored as a difftime vector with a custom class, and always with "seconds" as unit for robust coercion to numeric. Supports construction from time values, coercion to and from various data types, and formatting. Can be used as a regular column in a data frame.

hms() is a high-level constructor that accepts second, minute, hour and day components as numeric vectors.

new_hms() is a low-level constructor that only checks that its input has the correct base type, numeric.

is_hms() checks if an object is of class hms.

as_hms() forwards to vec_cast().

Usage

hms(seconds = NULL, minutes = NULL, hours = NULL, days = NULL)

new_hms(x = numeric())

is_hms(x)

as_hms(x)

## S3 method for class 'hms'
as.POSIXct(x, ...)

## S3 method for class 'hms'
as.POSIXlt(x, ...)

## S3 method for class 'hms'
as.character(x, ...)

## S3 method for class 'hms'
as.data.frame(x, row.names = NULL, optional = FALSE, ...,
  nm = paste(deparse(substitute(x), width.cutoff = 500L), collapse =
  " "))

## S3 method for class 'hms'
format(x, ...)

## S3 method for class 'hms'
print(x, ...)

Arguments

seconds, minutes, hours, days

Time since midnight. No bounds checking is performed.

x

An object.

...

additional arguments to be passed to or from methods.

row.names

NULL or a character vector giving the row names for the data frame. Missing values are not allowed.

optional

logical. If TRUE, setting row names and converting column names (to syntactic names: see make.names) is optional. Note that all of R's base package as.data.frame() methods use optional only for column names treatment, basically with the meaning of data.frame(*, check.names = !optional). See also the make.names argument of the matrix method.

nm

Name of column in new data frame

Details

For hms, all arguments must have the same length or be NULL. Odd combinations (e.g., passing only seconds and hours but not minutes) are rejected.

For arguments of type POSIXct and POSIXlt, as_hms() does not perform timezone conversion. Use lubridate::with_tz() and lubridate::force_tz() as necessary.

Examples

hms(56, 34, 12)
hms()

new_hms(as.numeric(1:3))
# Supports numeric only!
try(new_hms(1:3))

as_hms(1)
as_hms("12:34:56")
as_hms(Sys.time())
as.POSIXct(hms(1))
data.frame(a = hms(1))
d <- data.frame(hours = 1:3)
d$hours <- hms(hours = d$hours)
d

[Package hms version 0.5.2 Index]