EVOLUTION-MANAGER
Edit File: WWWusage.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: Internet Usage per Minute</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 WWWusage {datasets}"><tr><td>WWWusage {datasets}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Internet Usage per Minute</h2> <h3>Description</h3> <p>A time series of the numbers of users connected to the Internet through a server every minute. </p> <h3>Usage</h3> <pre>WWWusage</pre> <h3>Format</h3> <p>A time series of length 100. </p> <h3>Source</h3> <p>Durbin, J. and Koopman, S. J. (2001) <em>Time Series Analysis by State Space Methods.</em> Oxford University Press. <a href="http://www.ssfpack.com/dkbook/">http://www.ssfpack.com/dkbook/</a> </p> <h3>References</h3> <p>Makridakis, S., Wheelwright, S. C. and Hyndman, R. J. (1998) <em>Forecasting: Methods and Applications.</em> Wiley. </p> <h3>Examples</h3> <pre> require(graphics) work <- diff(WWWusage) par(mfrow = c(2, 1)); plot(WWWusage); plot(work) ## Not run: require(stats) aics <- matrix(, 6, 6, dimnames = list(p = 0:5, q = 0:5)) for(q in 1:5) aics[1, 1+q] <- arima(WWWusage, c(0, 1, q), optim.control = list(maxit = 500))$aic for(p in 1:5) for(q in 0:5) aics[1+p, 1+q] <- arima(WWWusage, c(p, 1, q), optim.control = list(maxit = 500))$aic round(aics - min(aics, na.rm = TRUE), 2) ## End(Not run)</pre> <hr /><div style="text-align: center;">[Package <em>datasets</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>