 follows <a href="https://doi.org/10.1080/00207160.2012.666348" target="_top">McDevitt,
      2012</a>, who vastly expanded the ideas of Lanczos to create a very general
      framework for numerically differentiating noisy equispaced data.
    </p>
<h4>
<a name="math_toolkit.diff0.h2"></a>
      <span class="phrase"><a name="math_toolkit.diff0.example"></a></span><a class="link" href="diff0.html#math_toolkit.diff0.example">Example</a>
    </h4>
<p>
      We have extracted some data from the <a href="https: