time2unit: Relative Time Conversion

In TobieSurette/gulf.utils: Southern Gulf of Saint Lawrence Utility Functions

Relative Time Conversion

Description

Calculate time difference relative to a specified reference time.

Usage

time2unit(x, reference, units, ...)

time2sec(x, ...)

time2min(x, ...)

time2hour(x, ...)

time2day(x, ...)

julian(x)

week(x, reference = "Sunday")

Arguments

x	Time variable.
reference	Reference date, time or day of the week.
units	Time units: secs, mins, hours or days.
...	Not used.

Functions

• time2sec(): Calculate time difference in seconds.

• time2min(): Calculate time difference in minutes.

• time2hour(): Calculate time difference in hours.

• time2day(): Calculate time difference in days.

• julian(): Calculate Julian day, i.e. the day of the year relative to January 1st.

• week(): Calculate to in which week of the year a date fall into.

See Also

difftime

Examples

# Create sample dates:
v <- date(c("2016-07-10", "2016-07-13", "2016-07-16", "2016-08-25", "2016-10-01"))

time2sec(v)   # Number of seconds relative to default Jan 1st, 1970.
time2sec(v, as.POSIXct("1900-01-01")) # Relative to default Jan 1st, 1900.
time2min(v, "1900-01-01")
time2hour(v, "1900-01-01")
time2day(v, "1900-01-01")

# Return the julian day for a set of dates.
julian(v)

TobieSurette/gulf.utils documentation built on Dec. 1, 2024, 6:01 a.m.