xts: firstof – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

firstof

Create a POSIXct Object

Enable fast creation of time stamps corresponding to the first or last observation in a specified time period.

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

`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

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

An object of class POSIXct.

Jeffrey A. Ryan

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

lastof(2007)
lastof(2007,10)

eXtensible Time Series

v0.12.1

GPL (>= 2)

Authors

Jeffrey A. Ryan [aut, cph], Joshua M. Ulrich [cre, aut], Ross Bennett [ctb], Corwin Joy [ctb]

Initial release