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Edit File: Dim.corStruct.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: Dimensions of a corStruct 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 Dim.corStruct {nlme}"><tr><td>Dim.corStruct {nlme}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Dimensions of a corStruct Object</h2> <h3>Description</h3> <p>if <code>groups</code> is missing, it returns the <code>Dim</code> attribute of <code>object</code>; otherwise, calculates the dimensions associated with the grouping factor. </p> <h3>Usage</h3> <pre> ## S3 method for class 'corStruct' Dim(object, groups, ...) </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="corClasses.html">corStruct</a>"</code>, representing a correlation structure.</p> </td></tr> <tr valign="top"><td><code>groups</code></td> <td> <p>an optional factor defining the grouping of the observations; observations within a group are correlated and observations in different groups are uncorrelated.</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>a list with components: </p> <table summary="R valueblock"> <tr valign="top"><td><code>N</code></td> <td> <p>length of <code>groups</code></p> </td></tr> <tr valign="top"><td><code>M</code></td> <td> <p>number of groups</p> </td></tr> <tr valign="top"><td><code>maxLen</code></td> <td> <p>maximum number of observations in a group</p> </td></tr> <tr valign="top"><td><code>sumLenSq</code></td> <td> <p>sum of the squares of the number of observations per group</p> </td></tr> <tr valign="top"><td><code>len</code></td> <td> <p>an integer vector with the number of observations per group</p> </td></tr> <tr valign="top"><td><code>start</code></td> <td> <p>an integer vector with the starting position for the observations in each group, beginning from zero</p> </td></tr> </table> <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="Dim.html">Dim</a></code>, <code><a href="Dim.corSpatial.html">Dim.corSpatial</a></code></p> <h3>Examples</h3> <pre> Dim(corAR1(), getGroups(Orthodont)) </pre> <hr /><div style="text-align: center;">[Package <em>nlme</em> version 3.1-139 <a href="00Index.html">Index</a>]</div> </body></html>