">end</span>
0090     <span class="keyword">return</span>
0091 <span class="keyword">end</span>    
0092 
0093 <span class="comment">%{</span>
0094  Calculate the time series of cross products (terms of the covariance matrix).
0095  This time series has coarser temporal resolution than x by a factor dsr.
0096 <span class="comment">%}</span>
0097 [xx,ind]=<a href="nt_xprod.html" class="code" title="function [y,ind]=nt_xprod(x,flag,dsratio,normrow_flag)">nt_xprod</a>(x,<span class="string">'lower'</span>,dsr)