aram"><span class="n"><span class="pre">nfft</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#utils.eigenspec" title="Permalink to this definition">¶</a></dt>
<dd><p>Calculate eigenspectra using DPSS sequences. 
Gets yk’s from Thomson (1982).</p>
<p><strong>Parameters</strong></p>
<dl class="simple">
<dt>x<span class="classifier">ndarray [npts,0]</span></dt><dd><p>real vector with the time series</p>
</dd>
<dt>vn<span class="classifier">ndarray [npts,kspec]   </span></dt><dd