s="comment">% zero for clipped, pos for OK</span>
0037 x2=min(x2,[],2); <span class="comment">% min over channels</span>
0038 xx=min(x1,x2); <span class="comment">% zero for clipped samples</span>
0039 
0040 y=zeros([m,1,o]);
0041 y(find(xx==0))=1;
0042 y=reshape(y,[m,o]); y=sum(y);
0043 
0044 plot(y);
0045</pre></div>
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