title: in plotyy the left y axis ticks overlap on right yaxis ticks. how do i delete this overlap? i donot want left y axis ticks seen on right y axis
body: <p>When I use plotyy to make a graph with two y axis. There is a problem that the ticks on primary y axis are also shown on secondary y axis. 
  here is the code</p>
  
  <pre><code>clear all;
  clc;
  load ('bval_time.txt');
  load ('loadtime.txt');
  load ('timeload.txt'); 
  load1 =loadtime(:,1);
  time1 =timeload(:,1); 
  time = bval_time(:,1);
  B_value = bval_time(:,2);
  [AX,H1,H2]=plotyy(time1,load1,time,B_value,'plot');
  title('Load-bvalue-Time variation graph-150grp');
  legend('Load','B_value',1);
  xlabel('Time(sec)')
  set(get(AX(1),'Ylabel'),'String','Load(KN)') 
  set(get(AX(2),'Ylabel'),'String','b-value')
  set(H1,'LineStyle','-')
  set(H2,'LineStyle','-','marker','*')
  set(AX(1), 'ylim', [0 15])
  set(AX(2), 'ylim', [0 2])
  set(AX(1),'YTick',[0:1:15])
  set(AX(2),'YTick',[0:0.2:2])
  </code></pre>