EVOLUTION-MANAGER
Edit File: Sitka89.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: Growth Curves for Sitka Spruce Trees in 1989</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 Sitka89 {MASS}"><tr><td>Sitka89 {MASS}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Growth Curves for Sitka Spruce Trees in 1989 </h2> <h3>Description</h3> <p>The <code>Sitka89</code> data frame has 632 rows and 4 columns. It gives repeated measurements on the log-size of 79 Sitka spruce trees, 54 of which were grown in ozone-enriched chambers and 25 were controls. The size was measured eight times in 1989, at roughly monthly intervals. </p> <h3>Usage</h3> <pre> Sitka89 </pre> <h3>Format</h3> <p>This data frame contains the following columns: </p> <dl> <dt><code>size</code></dt><dd><p>measured size (height times diameter squared) of tree, on log scale.</p> </dd> <dt><code>Time</code></dt><dd><p>time of measurement in days since 1 January 1988.</p> </dd> <dt><code>tree</code></dt><dd><p>number of tree.</p> </dd> <dt><code>treat</code></dt><dd><p>either <code>"ozone"</code> for an ozone-enriched chamber or <code>"control"</code>.</p> </dd> </dl> <h3>Source</h3> <p>P. J. Diggle, K.-Y. Liang and S. L. Zeger (1994) <em>Analysis of Longitudinal Data.</em> Clarendon Press, Oxford </p> <h3>See Also</h3> <p><code><a href="Sitka.html">Sitka</a></code> </p> <hr /><div style="text-align: center;">[Package <em>MASS</em> version 7.3-51.4 <a href="00Index.html">Index</a>]</div> </body></html>