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Edit File: getCovariate.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: Extract varFunc Covariate</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 getCovariate.varFunc {nlme}"><tr><td>getCovariate.varFunc {nlme}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Extract varFunc Covariate</h2> <h3>Description</h3> <p>This method function extracts the covariate(s) associated with the variance function represented by <code>object</code>, if any is present. </p> <h3>Usage</h3> <pre> ## S3 method for class 'varFunc' getCovariate(object, form, 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>varFunc</code>, representing a variance function structure.</p> </td></tr> <tr valign="top"><td><code>form</code></td> <td> <p>an optional formula specifying the covariate to be evaluated in <code>object</code>. Defaults to <code>formula(object)</code>.</p> </td></tr> <tr valign="top"><td><code>data</code></td> <td> <p>some methods for this generic require a <code>data</code> object. Not used in this method.</p> </td></tr> </table> <h3>Value</h3> <p>if <code>object</code> has a <code>covariate</code> attribute, its value is returned; else <code>NULL</code> is returned. </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="Covariate.varFunc.html">covariate<-.varFunc</a></code></p> <h3>Examples</h3> <pre> vf1 <- varPower(1.1, form = ~age) covariate(vf1) <- Orthodont[["age"]] getCovariate(vf1) </pre> <hr /><div style="text-align: center;">[Package <em>nlme</em> version 3.1-139 <a href="00Index.html">Index</a>]</div> </body></html>