EVOLUTION-MANAGER
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Create a POSIXct Object</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for firstof {xts}"><tr><td>firstof {xts}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Create a POSIXct Object </h2> <h3>Description</h3> <p>Enable fast creation of time stamps corresponding to the first or last observation in a specified time period. </p> <h3>Usage</h3> <pre> firstof(year = 1970, month = 1, day = 1, hour = 0, min = 0, sec = 0, tz = "") </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>year,month,day</code></td> <td> <p> numerical values to specify a day </p> </td></tr> <tr valign="top"><td><code>hour,min,sec</code></td> <td> <p> numerical vaues to specify time within a day </p> </td></tr> <tr valign="top"><td><code>tz</code></td> <td> <p> timezone used for conversion </p> </td></tr> </table> <h3>Details</h3> <p>A wrapper to the <span style="font-family: Courier New, Courier; color: #666666;"><b>R</b></span> function ISOdatetime with defaults corresponding to the first or last possible time in a given period. </p> <h3>Value</h3> <p>An object of class POSIXct. </p> <h3>Author(s)</h3> <p> Jeffrey A. Ryan </p> <h3>See Also</h3> <p><code><a href="../../base/html/ISOdatetime.html">ISOdatetime</a></code> </p> <h3>Examples</h3> <pre> firstof(2000) firstof(2005,01,01) lastof(2007) lastof(2007,10) </pre> <hr /><div style="text-align: center;">[Package <em>xts</em> version 0.12.2 <a href="00Index.html">Index</a>]</div> </body></html>