EVOLUTION-MANAGER
Edit File: vcov.coxph.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: Variance-covariance matrix</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 vcov.coxph {survival}"><tr><td>vcov.coxph {survival}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Variance-covariance matrix</h2> <h3>Description</h3> <p>Extract and return the variance-covariance matrix.</p> <h3>Usage</h3> <pre> ## S3 method for class 'coxph' vcov(object, complete=TRUE, ...) ## S3 method for class 'survreg' vcov(object, complete=TRUE, ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>object</code></td> <td> <p>a fitted model object</p> </td></tr> <tr valign="top"><td><code>complete</code></td> <td> <p>logical indicating if the full variance-covariance matrix should be returned. This has an effect only for an over-determined fit where some of the coefficients are undefined, and <code>coef(object)</code> contains corresponding NA values. If <code>complete=TRUE</code> the returned matrix will have row/column for each coefficient, if FALSE it will contain rows/columns corresponding to the non-missing coefficients. The coef() function has a simpilar <code>complete</code> argument. </p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>additional arguments for method functions</p> </td></tr> </table> <h3>Details</h3> <p>For the <code>coxph</code> and <code>survreg</code> functions the returned matrix is a particular generalized inverse: the row and column corresponding to any NA coefficients will be zero. This is a side effect of the generalized cholesky decomposion used in the unerlying compuatation. </p> <h3>Value</h3> <p>a matrix</p> <hr /><div style="text-align: center;">[Package <em>survival</em> version 2.44-1.1 <a href="00Index.html">Index</a>]</div> </body></html>