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: Unbiased Cross-Validation for Bandwidth Selection</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 ucv {MASS}"><tr><td>ucv {MASS}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Unbiased Cross-Validation for Bandwidth Selection </h2> <h3>Description</h3> <p>Uses unbiased cross-validation to select the bandwidth of a Gaussian kernel density estimator. </p> <h3>Usage</h3> <pre> ucv(x, nb = 1000, lower, upper) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>a numeric vector </p> </td></tr> <tr valign="top"><td><code>nb</code></td> <td> <p>number of bins to use. </p> </td></tr> <tr valign="top"><td><code>lower, upper</code></td> <td> <p>Range over which to minimize. The default is almost always satisfactory. </p> </td></tr></table> <h3>Value</h3> <p>a bandwidth. </p> <h3>References</h3> <p>Scott, D. W. (1992) <em>Multivariate Density Estimation: Theory, Practice, and Visualization.</em> Wiley. </p> <p>Venables, W. N. and Ripley, B. D. (2002) <em>Modern Applied Statistics with S.</em> Fourth edition. Springer. </p> <h3>See Also</h3> <p><code><a href="bcv.html">bcv</a></code>, <code><a href="width.SJ.html">width.SJ</a></code>, <code><a href="../../stats/html/density.html">density</a></code> </p> <h3>Examples</h3> <pre> ucv(geyser$duration) </pre> <hr /><div style="text-align: center;">[Package <em>MASS</em> version 7.3-51.4 <a href="00Index.html">Index</a>]</div> </body></html>