EVOLUTION-MANAGER
Edit File: rev.html
<!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: Reverse Elements</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 rev {base}"><tr><td>rev {base}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Reverse Elements</h2> <h3>Description</h3> <p><code>rev</code> provides a reversed version of its argument. It is generic function with a default method for vectors and one for <code><a href="../../stats/html/dendrogram.html">dendrogram</a></code>s. </p> <p>Note that this is no longer needed (nor efficient) for obtaining vectors sorted into descending order, since that is now rather more directly achievable by <code><a href="sort.html">sort</a>(x, decreasing = TRUE)</code>. </p> <h3>Usage</h3> <pre> rev(x) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>a vector or another object for which reversal is defined.</p> </td></tr> </table> <h3>References</h3> <p>Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) <em>The New S Language</em>. Wadsworth & Brooks/Cole. </p> <h3>See Also</h3> <p><code><a href="seq.html">seq</a></code>, <code><a href="sort.html">sort</a></code>.</p> <h3>Examples</h3> <pre> x <- c(1:5, 5:3) ## sort into descending order; first more efficiently: stopifnot(sort(x, decreasing = TRUE) == rev(sort(x))) stopifnot(rev(1:7) == 7:1) #- don't need 'rev' here </pre> <hr /><div style="text-align: center;">[Package <em>base</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>