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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Tracé de surfaces</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><link rel="home" href="index.html" title="Manuel de Genius"><link rel="up" href="ch04.html" title="Chapter 4. Tracé de graphiques"><link rel="prev" href="ch04s04.html" title="Champ de vecteurs"><link rel="next" href="ch05.html" title="Chapter 5. Fondamentaux GEL"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Tracé de surfaces</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s04.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Tracé de graphiques</th><td width="20%" align="right"> <a accesskey="n" href="ch05.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="genius-surface-plots"></a>Tracé de surfaces</h2></div></div></div><p lang="en">
	Genius can also plot surfaces.  Select the <span class="guilabel">Surface plot</span> tab in the
	main notebook of the <span class="guilabel">Create Plot</span> window.  Here you can specify a single
	expression that should use either <code class="varname">x</code> and <code class="varname">y</code> as real independent variables
	or <code class="varname">z</code> as a complex variable (where <code class="varname">x</code> is the real part of <code class="varname">z</code> and <code class="varname">y</code> is the
	imaginary part).  For example to plot the modulus of the cosine
	function for complex parameters,
	you could enter <strong class="userinput"><code>|cos(z)|</code></strong>.  This would be
	equivalent to <strong class="userinput"><code>|cos(x+1i*y)|</code></strong>.
	See <a class="xref" href="ch04s05.html#surfaceplot-fig" title="Figure 4.5. Graphique de surface">Figure 4.5, “Graphique de surface”</a>.
	For plotting using the command line see the documentation of the
        <a class="link" href="ch11s20.html#gel-function-SurfacePlot"><code class="function">SurfacePlot</code></a> function.
      </p><p lang="en">
	      The <code class="varname">z</code> range can be set automatically by turning on the <span class="guilabel">Fit dependent axis</span>
	      checkbox.  The variables can be renamed by clicking the <span class="guilabel">Change variable names...</span> button, which is useful if you wish to print or save the figure and don't want to use the standard
	      names.  Finally you can also avoid printing the legend, which is also useful if printing or
	      saving, when the legend might simply be clutter.
      </p><div class="figure"><a name="surfaceplot-fig"></a><p class="title"><b>Figure 4.5. Graphique de surface</b></p><div class="figure-contents"><div class="screenshot"><div lang="en" class="mediaobject"><img src="figures/surface_graph.png" alt="Modulus of the complex cosine function."></div></div></div></div><br class="figure-break"><p lang="en">
	      In surface mode, left and right arrow keys on your keyboard will rotate the
	      view along the z axis.  Alternatively you can rotate along any axis by
	      selecting <span class="guilabel">Rotate axis...</span> in the <span class="guilabel">View</span> 
	      menu.  The <span class="guilabel">View</span> menu also has a top view mode which rotates the
	      graph so that the z axis is facing straight out, that is, we view the graph from the top
	      and get essentially just the colors that define the values of the function getting a
	      temperature plot of the function.  Finally you should
	      try <span class="guilabel">Start rotate animation</span>, to start a continuous slow rotation.
	      This is especially good if using <span class="application">Genius Mathematics Tool</span> to present to an audience.
      </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch04s04.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch05.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Champ de vecteurs </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 5. Fondamentaux GEL</td></tr></table></div></body></html>