EVOLUTION-MANAGER
Edit File: stackloss.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: Brownlee's Stack Loss Plant Data</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 stackloss {datasets}"><tr><td>stackloss {datasets}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Brownlee's Stack Loss Plant Data</h2> <h3>Description</h3> <p>Operational data of a plant for the oxidation of ammonia to nitric acid. </p> <h3>Usage</h3> <pre> stackloss stack.x stack.loss </pre> <h3>Format</h3> <p><code>stackloss</code> is a data frame with 21 observations on 4 variables. </p> <table summary="Rd table"> <tr> <td style="text-align: right;"> [,1] </td><td style="text-align: left;"> <code>Air Flow</code> </td><td style="text-align: left;"> Flow of cooling air</td> </tr> <tr> <td style="text-align: right;"> [,2] </td><td style="text-align: left;"> <code>Water Temp</code> </td><td style="text-align: left;"> Cooling Water Inlet Temperature</td> </tr> <tr> <td style="text-align: right;"> [,3] </td><td style="text-align: left;"> <code>Acid Conc.</code> </td><td style="text-align: left;"> Concentration of acid [per 1000, minus 500]</td> </tr> <tr> <td style="text-align: right;"> [,4] </td><td style="text-align: left;"> <code>stack.loss</code> </td><td style="text-align: left;"> Stack loss</td> </tr> <tr> <td style="text-align: right;"> </td> </tr> </table> <p>For compatibility with S-PLUS, the data sets <code>stack.x</code>, a matrix with the first three (independent) variables of the data frame, and <code>stack.loss</code>, the numeric vector giving the fourth (dependent) variable, are provided as well. </p> <h3>Details</h3> <p>“Obtained from 21 days of operation of a plant for the oxidation of ammonia (NH<i>3</i>) to nitric acid (HNO<i>3</i>). The nitric oxides produced are absorbed in a countercurrent absorption tower”. (Brownlee, cited by Dodge, slightly reformatted by MM.) </p> <p><code>Air Flow</code> represents the rate of operation of the plant. <code>Water Temp</code> is the temperature of cooling water circulated through coils in the absorption tower. <code>Acid Conc.</code> is the concentration of the acid circulating, minus 50, times 10: that is, 89 corresponds to 58.9 per cent acid. <code>stack.loss</code> (the dependent variable) is 10 times the percentage of the ingoing ammonia to the plant that escapes from the absorption column unabsorbed; that is, an (inverse) measure of the over-all efficiency of the plant. </p> <h3>Source</h3> <p>Brownlee, K. A. (1960, 2nd ed. 1965) <em>Statistical Theory and Methodology in Science and Engineering</em>. New York: Wiley. pp. 491–500. </p> <h3>References</h3> <p>Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) <em>The New S Language</em>. Wadsworth & Brooks/Cole. </p> <p>Dodge, Y. (1996) The guinea pig of multiple regression. In: <em>Robust Statistics, Data Analysis, and Computer Intensive Methods; In Honor of Peter Huber's 60th Birthday</em>, 1996, <em>Lecture Notes in Statistics</em> <b>109</b>, Springer-Verlag, New York. </p> <h3>Examples</h3> <pre> require(stats) summary(lm.stack <- lm(stack.loss ~ stack.x)) </pre> <hr /><div style="text-align: center;">[Package <em>datasets</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>