title: Graphite: series with constant calculation
body: <p>I have a metric that represents a hit ratio of my DB.</p>
  
  <p>I want a graph showing the miss ratio (1 - hit_ratio)</p>
  
  <p>Is there a way do do that in graphite?</p>
  
  <p>Basically the question is how to calculate:</p>
  
  <p>1 - <em>series with wildcards</em></p>