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<!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: Fit the Asymptotic Regression Model</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 NLSstAsymptotic {stats}"><tr><td>NLSstAsymptotic {stats}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Fit the Asymptotic Regression Model</h2> <h3>Description</h3> <p>Fits the asymptotic regression model, in the form <code>b0 + b1*(1-exp(-exp(lrc) * x))</code> to the <code>xy</code> data. This can be used as a building block in determining starting estimates for more complicated models. </p> <h3>Usage</h3> <pre> NLSstAsymptotic(xy) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>xy</code></td> <td> <p>a <code>sortedXyData</code> object</p> </td></tr> </table> <h3>Value</h3> <p>A numeric value of length 3 with components labelled <code>b0</code>, <code>b1</code>, and <code>lrc</code>. <code>b0</code> is the estimated intercept on the <code>y</code>-axis, <code>b1</code> is the estimated difference between the asymptote and the <code>y</code>-intercept, and <code>lrc</code> is the estimated logarithm of the rate constant. </p> <h3>Author(s)</h3> <p>José Pinheiro and Douglas Bates</p> <h3>See Also</h3> <p><code><a href="SSasymp.html">SSasymp</a></code></p> <h3>Examples</h3> <pre> Lob.329 <- Loblolly[ Loblolly$Seed == "329", ] print(NLSstAsymptotic(sortedXyData(expression(age), expression(height), Lob.329)), digits = 3) </pre> <hr /><div style="text-align: center;">[Package <em>stats</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>