eans y is delayed relative to x.</span>
0010 <span class="comment">%</span>
0011 <span class="comment">%  x and y can be time X channels or time X channels X trials.  They can</span>
0012 <span class="comment">%  also be cell arrays of time X channels matrices.</span>
0013 <span class="comment">%</span>
0014 <span class="comment">% See also nt_relshift.</span>
0015 <span class="comment">%</span>
0016 <span class="comment">%  NoiseTools</span>
0017 
0018 <span class="keyword">if</span> nargin&lt;2; error(<sp