EVOLUTION-MANAGER
Edit File: xDetails.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: Boundary of a grid grob</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 xDetails {grid}"><tr><td>xDetails {grid}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Boundary of a grid grob </h2> <h3>Description</h3> <p>These generic functions are used to determine a location on the boundary of a grid grob. </p> <h3>Usage</h3> <pre> xDetails(x, theta) yDetails(x, theta) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p> A grid grob. </p> </td></tr> <tr valign="top"><td><code>theta</code></td> <td> <p> A numeric angle, in degrees, measured anti-clockwise from the 3 o'clock <em>or</em> one of the following character strings: <code>"north"</code>, <code>"east"</code>, <code>"west"</code>, <code>"south"</code>.</p> </td></tr> </table> <h3>Details</h3> <p>The location on the grob boundary is determined by taking a line from the centre of the grob at the angle <code>theta</code> and intersecting it with the convex hull of the grob (for the basic grob primitives, the centre is determined as half way between the minimum and maximum values in x and y directions). </p> <p>These functions are called in the calculation of <code>"grobx"</code> and <code>"groby"</code> units as produced by the <code>grobX</code> and <code>grobY</code> functions. Methods should be written for classes derived from grob or gTree where the boundary of the grob can be determined. </p> <h3>Value</h3> <p>A unit object. </p> <h3>Author(s)</h3> <p> Paul Murrell </p> <h3>See Also</h3> <p><code><a href="grobX.html">grobX</a></code>, <code><a href="grobX.html">grobY</a></code>. </p> <hr /><div style="text-align: center;">[Package <em>grid</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>