EVOLUTION-MANAGER
Edit File: Pixel.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: X-ray pixel intensities over time</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 Pixel {nlme}"><tr><td>Pixel {nlme}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>X-ray pixel intensities over time</h2> <h3>Description</h3> <p>The <code>Pixel</code> data frame has 102 rows and 4 columns of data on the pixel intensities of CT scans of dogs over time </p> <h3>Format</h3> <p>This data frame contains the following columns: </p> <dl> <dt>Dog</dt><dd> <p>a factor with levels <code>1</code> to <code>10</code> designating the dog on which the scan was made </p> </dd> <dt>Side</dt><dd> <p>a factor with levels <code>L</code> and <code>R</code> designating the side of the dog being scanned </p> </dd> <dt>day</dt><dd> <p>a numeric vector giving the day post injection of the contrast on which the scan was made </p> </dd> <dt>pixel</dt><dd> <p>a numeric vector of pixel intensities </p> </dd> </dl> <h3>Source</h3> <p>Pinheiro, J. C. and Bates, D. M. (2000) <em>Mixed-effects Models in S and S-PLUS</em>, Springer. </p> <h3>Examples</h3> <pre> fm1 <- lme(pixel ~ day + I(day^2), data = Pixel, random = list(Dog = ~ day, Side = ~ 1)) summary(fm1) VarCorr(fm1) </pre> <hr /><div style="text-align: center;">[Package <em>nlme</em> version 3.1-139 <a href="00Index.html">Index</a>]</div> </body></html>