esh(j-1) &amp; v &lt; speed_thresh(j));
0308         indxB =  find(v &gt;= speed_thresh(j));
0309         
0310         handles.zone{i}.t{j+1}.data = t(indxA);
0311         handles.zone{i}.x{j+1}.data = x(indxA);     
0312         handles.zone{i}.y{j+1}.data = y(indxA);        
0313         handles.zone{i}.r{j+1}.data = r(indxA);       
0314         handles.zone{i}.theta{j+1}.data = theta(indxA);       
0315         handles.zone{i}.vx{j+1}.data = vx(indxA);       
0316         handles.zone{i}.vy{j+1}.data =