EVOLUTION-MANAGER
Edit File: getInitial.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: Get Initial Parameter Estimates</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 getInitial {stats}"><tr><td>getInitial {stats}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Get Initial Parameter Estimates</h2> <h3>Description</h3> <p>This function evaluates initial parameter estimates for a nonlinear regression model. If <code>data</code> is a parameterized data frame or <code>pframe</code> object, its <code>parameters</code> attribute is returned. Otherwise the object is examined to see if it contains a call to a <code>selfStart</code> object whose <code>initial</code> attribute can be evaluated. </p> <h3>Usage</h3> <pre> getInitial(object, data, ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>object</code></td> <td> <p>a formula or a <code><a href="selfStart.html">selfStart</a></code> model that defines a nonlinear regression model</p> </td></tr> <tr valign="top"><td><code>data</code></td> <td> <p>a data frame in which the expressions in the formula or arguments to the <code>selfStart</code> model can be evaluated</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>optional additional arguments</p> </td></tr> </table> <h3>Value</h3> <p>A named numeric vector or list of starting estimates for the parameters. The construction of many <code>selfStart</code> models is such that these "starting" estimates are, in fact, the converged parameter estimates. </p> <h3>Author(s)</h3> <p>José Pinheiro and Douglas Bates</p> <h3>See Also</h3> <p><code><a href="nls.html">nls</a></code>, <code><a href="selfStart.html">selfStart</a></code>, <code><a href="selfStart.html">selfStart.default</a></code>, <code><a href="selfStart.html">selfStart.formula</a></code>. Further, <code><a href="../../nlme/html/nlsList.html">nlsList</a></code> from <a href="https://CRAN.R-project.org/package=nlme"><span class="pkg">nlme</span></a>. </p> <h3>Examples</h3> <pre> PurTrt <- Puromycin[ Puromycin$state == "treated", ] print(getInitial( rate ~ SSmicmen( conc, Vm, K ), PurTrt ), 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>