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Edit File: zAxis.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: Generic Function to Add an Axis to a Plot</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 Axis {graphics}"><tr><td>Axis {graphics}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Generic Function to Add an Axis to a Plot</h2> <h3>Description</h3> <p>Generic function to add a suitable axis to the current plot. </p> <h3>Usage</h3> <pre> Axis(x = NULL, at = NULL, ..., side, labels = NULL) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>an object which indicates the range over which an axis should be drawn</p> </td></tr> <tr valign="top"><td><code>at</code></td> <td> <p>the points at which tick-marks are to be drawn.</p> </td></tr> <tr valign="top"><td><code>side</code></td> <td> <p>an integer specifying which side of the plot the axis is to be drawn on. The axis is placed as follows: 1=below, 2=left, 3=above and 4=right.</p> </td></tr> <tr valign="top"><td><code>labels</code></td> <td> <p>this can either be a logical value specifying whether (numerical) annotations are to be made at the tickmarks, or a character or expression vector of labels to be placed at the tickpoints. If this is specified as a character or expression vector, <code>at</code> should be supplied and they should be the same length.</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>arguments to be passed to methods and perhaps then to <code><a href="axis.html">axis</a></code>.</p> </td></tr> </table> <h3>Details</h3> <p>This is a generic function. It works in a slightly non-standard way: if <code>x</code> is supplied and non-NULL it dispatches on <code>x</code>, otherwise if <code>at</code> is supplied and non-NULL it dispatches on <code>at</code>, and the default action is to call <code><a href="axis.html">axis</a></code>, omitting argument <code>x</code>. </p> <p>The idea is that for plots for which either or both of the axes are numerical but with a special interpretation, the standard plotting functions (including <code><a href="boxplot.html">boxplot</a></code>, <code><a href="contour.html">contour</a></code>, <code><a href="coplot.html">coplot</a></code>, <code><a href="filled.contour.html">filled.contour</a></code>, <code><a href="pairs.html">pairs</a></code>, <code><a href="plot.default.html">plot.default</a></code>, <code><a href="rug.html">rug</a></code> and <code><a href="stripchart.html">stripchart</a></code>) will set up user coordinates and <code>Axis</code> will be called to label them appropriately. </p> <p>There are <code>"Date"</code> and <code>"POSIXt"</code> methods which can pass an argument <code>format</code> on to the appropriate <code>axis</code> method (see <code><a href="axis.POSIXct.html">axis.POSIXct</a></code>). </p> <h3>Value</h3> <p>The numeric locations on the axis scale at which tick marks were drawn when the plot was first drawn (see ‘Details’). </p> <p>This function is usually invoked for its side effect, which is to add an axis to an already existing plot. </p> <h3>See Also</h3> <p><code><a href="axis.html">axis</a></code> (which is eventually called from all <code>Axis()</code> methods in package <span class="pkg">graphics</span>. </p> <hr /><div style="text-align: center;">[Package <em>graphics</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>