firstof: Create a POSIXct Object

In xts: eXtensible Time Series

Create a POSIXct Object

Description

Easily create of time stamps corresponding to the first or last observation in a specified time period.

Usage

firstof(year = 1970, month = 1, day = 1, hour = 0, min = 0, sec = 0, tz = "")

lastof(
  year = 1970,
  month = 12,
  day = 31,
  hour = 23,
  min = 59,
  sec = 59,
  subsec = 0.99999,
  tz = ""
)

Arguments

year, month, day	Numeric values to specify a day.
hour, min, sec	Numeric vaues to specify time within a day.
tz	Timezone used for conversion.
subsec	Number of sub-seconds.

Details

This is a wrapper to ISOdatetime() with defaults corresponding to the first or last possible time in a given period.

Value

An POSIXct object.

Author(s)

Jeffrey A. Ryan

See Also

ISOdatetime()

Examples

firstof(2000)
firstof(2005,01,01)

lastof(2007)
lastof(2007,10)

xts documentation built on Oct. 16, 2024, 1:08 a.m.