EVOLUTION-MANAGER
Edit File: fct_drop.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: Drop unused levels</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 fct_drop {forcats}"><tr><td>fct_drop {forcats}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Drop unused levels</h2> <h3>Description</h3> <p>Compared to <code>base::droplevels()</code>, does not drop <code>NA</code> levels that have values. </p> <h3>Usage</h3> <pre> fct_drop(f, only) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>f</code></td> <td> <p>A factor (or character vector).</p> </td></tr> <tr valign="top"><td><code>only</code></td> <td> <p>A character vector restricting the set of levels to be dropped. If supplied, only levels that have no entries and appear in this vector will be removed.</p> </td></tr> </table> <h3>See Also</h3> <p><code><a href="fct_expand.html">fct_expand()</a></code> to add additional levels to a factor. </p> <h3>Examples</h3> <pre> f <- factor(c("a", "b"), levels = c("a", "b", "c")) f fct_drop(f) # Set only to restrict which levels to drop fct_drop(f, only = "a") fct_drop(f, only = "c") </pre> <hr /><div style="text-align: center;">[Package <em>forcats</em> version 0.5.0 <a href="00Index.html">Index</a>]</div> </body></html>