EVOLUTION-MANAGER
Edit File: update.varFunc.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: Update varFunc 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 update.varFunc {nlme}"><tr><td>update.varFunc {nlme}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Update varFunc Object</h2> <h3>Description</h3> <p>If the <code>formula(object)</code> includes a <code>"."</code> term, representing a fitted object, the variance covariate needs to be updated upon completion of an optimization cycle (in which the variance function weights are kept fixed). This method function allows a reevaluation of the variance covariate using the current fitted object and, optionally, other variables in the original data. </p> <h3>Usage</h3> <pre> ## S3 method for class 'varFunc' update(object, data, ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>object</code></td> <td> <p>an object inheriting from class <code>"<a href="varFunc.html">varFunc</a>"</code>, representing a variance function structure.</p> </td></tr> <tr valign="top"><td><code>data</code></td> <td> <p>a list with a component named <code>"."</code> with the current version of the fitted object (from which fitted values, coefficients, and residuals can be extracted) and, if necessary, other variables used to evaluate the variance covariate(s).</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>some methods for this generic require additional arguments. None are used in this method.</p> </td></tr> </table> <h3>Value</h3> <p>if <code>formula(object)</code> includes a <code>"."</code> term, an <code>varFunc</code> object similar to <code>object</code>, but with the variance covariate reevaluated at the current fitted object value; else <code>object</code> is returned unchanged. </p> <h3>Author(s)</h3> <p>José Pinheiro and Douglas Bates <a href="mailto:bates@stat.wisc.edu">bates@stat.wisc.edu</a></p> <h3>See Also</h3> <p><code><a href="needUpdate.html">needUpdate</a></code>, <code><a href="Covariate.varFunc.html">covariate<-.varFunc</a></code> </p> <hr /><div style="text-align: center;">[Package <em>nlme</em> version 3.1-139 <a href="00Index.html">Index</a>]</div> </body></html>