            <span class="keyword">else</span>
0208                 <span class="comment">% find the first such point</span>
0209                 isb_start = find(isb_section==1,1,<span class="string">'first'</span>);
0210                 <span class="comment">% limit section to only those points</span>
0211                 flow_section(i,1)=flow_section(i,1)+isb_start-1;
0212             <span class="keyword">end</span>
0213         <span class="keyword">end</span>
0214         <span class="comment">% if fl