R: Create a POSIXct Object

firstof {xts} | R Documentation

## Create a POSIXct Object

### Description

Enable fast creation 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 = "")

### Arguments

`year,month,day` | numerical values to specify a day
`hour,min,sec` | numerical vaues to specify time within a day
`tz` | timezone used for conversion

### Details

A wrapper to the R function ISOdatetime with defaults corresponding to the first or last possible time in a given period.

### Value

An object of class POSIXct.

### Author(s)

Jeffrey A. Ryan

### See Also

`ISOdatetime`

### Examples

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

    lastof(2007)
    lastof(2007,10)

[Package xts version 0.12.1 Index]