as.Date0: Format Date-Time

In einaooka/tea.datetime: DateTime Formatting

Description

Formatting function for date-time data.

Usage

as.Date0(date)

MonthFromDate(date)

FirstDayOfMonth(date)

YearFromDate(date)

DateAsDateTime(date)

DOW(date)

HourFromDateTime(datetime)

DateFromDateTime(datetime)

DateAndHEAsPOSIX(date, HE)

Arguments

date	Date in either 'character' or 'date' format.
datetime	date-time in 'POSIXct' format.
HE	Integer (1:24) indicating hour-ending.

Details

DateFromDateTime is different from simply using as.Date(date-time), because date-time is stored in standard time with time zone in R.

Functions

• MonthFromDate: Given a date, rerurn the month as numeric

• FirstDayOfMonth: Given a date, returns the first day of the month

• YearFromDate: Given a date, rerurn the year as numeric

• DateAsDateTime: Given a date, returns 12:00am of the date in POSIXct format

• DOW: Day of week from a date

• HourFromDateTime: Given a date-time, return the hour as numeric

• DateFromDateTime: Given a date-time, returns a date.

• DateAndHEAsPOSIX: Given a date and HE, returns the date-time for the beginning of the hour.

Examples

as.Date0("1/1/2000")
as.Date1("1/1/2000"); as.Date1("2000-1-1")

dates <- seq(as.Date("2000-1-1"), length.out = 6, by="mon")+15
dates
MonthFromDate(dates)
FirstDayOfMonth(dates)
YearFromDate(dates)
DOW(dates)
DateAndHEAsPOSIX(dates, c(1:10))

datetimes <- DateAsDateTime(dates)+8*60*60
datetimes
HourFromDateTime(datetimes)
DateFromDateTime(datetimes)

einaooka/tea.datetime documentation built on May 16, 2019, 1:25 a.m.