title: rrdtool y-axis values "200m" instead of "0.2"
body: <p>I've got a rrd which contains mostly values 0 to 1 (linux load avarage).</p>
  
  <p>Sometimes the graph displays at the y-axis => "0.1 0.2 ... 0.9". That's the way I want it.</p>
  
  <p>But other times, I see the following "100m 200m ...".</p>
  
  <p>Is there a way to force displaying as "0.1 etc." values?</p>