      <td></td>
          <td class="paramtype">&#160;</td>
          <td class="paramname"><em>t</em>&#160;</td>
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          <td>)</td>
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<p><a class="el" href="classprojects_1_1piwavelet_1_1piwavelet_1_1piwavelet_1_1DOG.html" title="Implements the derivative of a Guassian wavelet class.">DOG</a> wavelet as described in Torrence and Compo (1998) </p>
<p>The derivative of a Gaussi