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: Evaluate Trend Surface over a Grid</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 trmat {spatial}"><tr><td>trmat {spatial}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Evaluate Trend Surface over a Grid </h2> <h3>Description</h3> <p>Evaluate trend surface over a grid. </p> <h3>Usage</h3> <pre> trmat(obj, xl, xu, yl, yu, n) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>obj</code></td> <td> <p>object returned by <code>surf.ls</code> or <code>surf.gls</code> </p> </td></tr> <tr valign="top"><td><code>xl</code></td> <td> <p>limits of the rectangle for grid </p> </td></tr> <tr valign="top"><td><code>xu</code></td> <td> </td></tr> <tr valign="top"><td><code>yl</code></td> <td> </td></tr> <tr valign="top"><td><code>yu</code></td> <td> </td></tr> <tr valign="top"><td><code>n</code></td> <td> <p>use <code>n</code> x <code>n</code> grid within the rectangle </p> </td></tr></table> <h3>Value</h3> <p>list with components <code>x</code>, <code>y</code> and <code>z</code> suitable for <code>contour</code> and <code>image</code>. </p> <h3>References</h3> <p>Ripley, B. D. (1981) <em>Spatial Statistics.</em> Wiley. </p> <p>Venables, W. N. and Ripley, B. D. (2002) <em>Modern Applied Statistics with S.</em> Fourth edition. Springer. </p> <h3>See Also</h3> <p><code><a href="surf.ls.html">surf.ls</a></code>, <code><a href="surf.gls.html">surf.gls</a></code> </p> <h3>Examples</h3> <pre> data(topo, package="MASS") topo.kr <- surf.ls(2, topo) trsurf <- trmat(topo.kr, 0, 6.5, 0, 6.5, 50) </pre> <hr /><div style="text-align: center;">[Package <em>spatial</em> version 7.3-11 <a href="00Index.html">Index</a>]</div> </body></html>