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<h3 class="section">D.5 <code>gsldif</code></h3>

<p>Numerical differentiation of a real valued function of a single real
<a name="index-numerical-differentiation-718"></a>variable can be done by a library function of the form

<pre class="example">     library('gsldif',method)
</pre>
   <p class="noindent">where <code>method</code> is one of

     <ul>
<li><code>'backward'</code>
<li><code>'central'</code>
<li><code>'forward'</code>
<li><code>'t_backward'</code>
<li><code>'t_central'</code>
<li><code>'t_forward'</code>
</ul>

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<li><a accesskey="1" href="gsldif-input-parameters.html#gsldif-input-parameters">gsldif input parameters</a>
<li><a accesskey="2" href="gsldif-output.html#gsldif-output">gsldif output</a>
<li><a accesskey="3" href="gsldif-exceptions.html#gsldif-exceptions">gsldif exceptions</a>
<li><a accesskey="4" href="Additional-gsldif-notes.html#Additional-gsldif-notes">Additional gsldif notes</a>
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