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<title>MathGL 2.1.2: 2. MathGL examples</title>

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<a name="Examples"></a>
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<a name="MathGL-examples"></a>
<h1 class="chapter">2. MathGL examples</h1>

<p>This chapter contain information about basic and advanced MathGL, hints and samples for all types of graphics. I recommend you read first 2 sections one after another and at least look on <a href="mathgl_en_18.html#Hints">Hints</a> section. Also I recommend you to look at <a href="mathgl_en_20.html#General-concepts">General concepts</a> and <a href="mathgl_en_19.html#FAQ">FAQ</a>.
</p>
<p>Note, that MathGL v.2.* have only 2 end-user interfaces: one for C/Fortran and similar languages which don&rsquo;t support classes, another one for C++/Python/Octave and similar languages which support classes. So, most of samples placed in this chapter can be run as is (after minor changes due to different syntaxes for different languages). For example, the C++ code
</p><pre class="verbatim">#include &lt;mgl2/mgl.h&gt;
int main()
{
  mglGraph gr;
  gr.FPlot(&quot;sin(pi*x)&quot;);
  gr.WriteFrame(&quot;test.png&quot;);
}
</pre><p>in Python will be as
</p><pre class="verbatim">from mathgl import *
gr = mglGraph();
gr.FPlot(&quot;sin(pi*x)&quot;);
gr.WriteFrame(&quot;test.png&quot;);
</pre><p>in Octave will be as (you need first install MathGL package by command <code>octave:1&gt; pkg install /usr/share/mathgl/octave/mathgl.tar.gz</code> from <code>sudo octave</code>)
</p><pre class="verbatim">gr = mglGraph();
gr.FPlot(&quot;sin(pi*x)&quot;);
gr.WriteFrame(&quot;test.png&quot;);
</pre><p>in C will be as
</p><pre class="verbatim">#include &lt;mgl2/mgl_cf.h&gt;
int main()
{
  HMGL gr = mgl_create_graph(600,400);
  mgl_fplot(gr,&quot;sin(pi*x)&quot;,&quot;&quot;,&quot;&quot;);
  mgl_write_frame(gr,&quot;test.png&quot;,&quot;&quot;);
  mgl_delete_graph(gr);
}
</pre><p>in Fortran will be as
</p><pre class="verbatim">integer gr, mgl_create_graph
gr = mgl_create_graph(600,400);
call mgl_fplot(gr,'sin(pi*x)','','');
call mgl_write_frame(gr,'test.png','');
call mgl_delete_graph(gr);
</pre><p>and so on.
</p>


<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="mathgl_en_10.html#Basic-usage">2.1 Basic usage</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_11.html#Advanced-usage">2.2 Advanced usage</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_12.html#Data-handling">2.3 Data handling</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_13.html#Data-plotting">2.4 Data plotting</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_14.html#g_t1D-samples">2.5 1D samples</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_15.html#g_t2D-samples">2.6 2D samples</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_16.html#g_t3D-samples">2.7 3D samples</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_17.html#Vector-field-samples">2.8 Vector field samples</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_18.html#Hints">2.9 Hints</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="mathgl_en_19.html#FAQ">2.10 FAQ</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>


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