ce signal length (2*npts)</p>
</dd>
<dt>fx<span class="classifier">ndarray, clomplex              </span></dt><dd><p>The FFT of the signal (twice length)</p>
</dd>
<dt>nf<span class="classifier">int</span></dt><dd><p>Number of frequency points for spec</p>
</dd>
<dt>ntap<span class="classifier">int, optional</span></dt><dd><p>Constant number of tapers to average from
if None, kopt is used.
if &gt; 0  Constant value to be used
if &lt;= 0 Use the kopt array instead</p>
</dd>
<dt>ktop<span class="classifier">n