EVOLUTION-MANAGER
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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: Calculate Inverse of a Positive-Definite Matrix</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 solve.pdMat {nlme}"><tr><td>solve.pdMat {nlme}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Calculate Inverse of a Positive-Definite Matrix</h2> <h3>Description</h3> <p>The positive-definite matrix represented by <code>a</code> is inverted and assigned to <code>a</code>. </p> <h3>Usage</h3> <pre> ## S3 method for class 'pdMat' solve(a, b, ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>a</code></td> <td> <p>an object inheriting from class <code>"<a href="pdMat.html">pdMat</a>"</code>, representing a positive definite matrix.</p> </td></tr> <tr valign="top"><td><code>b</code></td> <td> <p>this argument is only included for consistency with the generic function and is not used in this method function.</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>some methods for this generic require additional arguments. None are used in this method.</p> </td></tr> </table> <h3>Value</h3> <p>a <code>pdMat</code> object similar to <code>a</code>, but with coefficients corresponding to the inverse of the positive-definite matrix represented by <code>a</code>. </p> <h3>Author(s)</h3> <p>José Pinheiro and Douglas Bates <a href="mailto:bates@stat.wisc.edu">bates@stat.wisc.edu</a></p> <h3>See Also</h3> <p><code><a href="pdMat.html">pdMat</a></code></p> <h3>Examples</h3> <pre> pd1 <- pdCompSymm(3 * diag(3) + 1) solve(pd1) </pre> <hr /><div style="text-align: center;">[Package <em>nlme</em> version 3.1-139 <a href="00Index.html">Index</a>]</div> </body></html>