           e.g. For N = 500, if PAD = -1, we do not pad; if PAD = 0, we pad the FFT</span>
0048 <span class="comment">%                       to 512 points, if pad=1, we pad to 1024 points etc.</span>
0049 <span class="comment">%                       Defaults to 0.</span>
0050 <span class="comment">%           Fs   (sampling frequency) - optional. Default 1.</span>
0051 <span class="comment">%           fpass    (frequency band to be used in the calculation in the form</span>
0052 <span class="comment