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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: Interpret a GAM formula</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 interpret.gam {mgcv}"><tr><td>interpret.gam {mgcv}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Interpret a GAM formula</h2> <h3>Description</h3> <p> This is an internal function of package <code>mgcv</code>. It is a service routine for <code>gam</code> which splits off the strictly parametric part of the model formula, returning it as a formula, and interprets the smooth parts of the model formula. </p> <p>Not normally called directly. </p> <h3>Usage</h3> <pre>interpret.gam(gf, extra.special = NULL)</pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>gf</code></td> <td> <p>A GAM formula as supplied to <code><a href="gam.html">gam</a></code> or <code><a href="gamm.html">gamm</a></code>, or a list of such formulae, as supplied for some <code><a href="gam.html">gam</a></code> families.</p> </td></tr> <tr valign="top"><td><code>extra.special</code></td> <td> <p>Name of any extra special in formula in addition to <code>s</code>, <code>te</code>, <code>ti</code> and <code>t2</code>.</p> </td></tr> </table> <h3>Value</h3> <p>An object of class <code>split.gam.formula</code> with the following items: </p> <table summary="R valueblock"> <tr valign="top"><td><code>pf</code></td> <td> <p>A model formula for the strictly parametric part of the model.</p> </td></tr> <tr valign="top"><td><code>pfok</code></td> <td> <p>TRUE if there is a <code>pf</code> formula.</p> </td></tr> <tr valign="top"><td><code>smooth.spec</code></td> <td> <p>A list of class <code>xx.smooth.spec</code> objects where <code>xx</code> depends on the basis specified for the term. (These can be passed to smooth constructor method functions to actually set up penalties and bases.)</p> </td></tr> <tr valign="top"><td><code>full.formula</code></td> <td> <p>An expanded version of the model formula in which the options are fully expanded, and the options do not depend on variables which might not be available later.</p> </td></tr> <tr valign="top"><td><code>fake.formula</code></td> <td> <p>A formula suitable for use in evaluating a model frame.</p> </td></tr> <tr valign="top"><td><code>response</code></td> <td> <p>Name of the response variable.</p> </td></tr> </table> <h3>Author(s)</h3> <p> Simon N. Wood <a href="mailto:simon.wood@r-project.org">simon.wood@r-project.org</a></p> <h3>References</h3> <p><a href="http://www.maths.bris.ac.uk/~sw15190/">http://www.maths.bris.ac.uk/~sw15190/</a> </p> <h3>See Also</h3> <p><code><a href="gam.html">gam</a></code> <code><a href="gamm.html">gamm</a></code></p> <hr /><div style="text-align: center;">[Package <em>mgcv</em> version 1.8-28 <a href="00Index.html">Index</a>]</div> </body></html>