title: Converting a data frame to table
body: <p>I have a data frame in the following format:</p>
  
  <pre><code> state1     state2     score
     A          A          3
     A          B          13
     A          C          5
     B          A          1
     B          B          0
     B          C          0
     C          A          5
     C          B          6
     C          C          3
  </code></pre>
  
  <p>I would like to convert it to a table:</p>
  
  <pre><code>      A     B     C
  A     3     13    5 
  B     1     0     0
  C     5     6     3
  </code></pre>
  
  <p>Is there an easy way of doing this other than manually?</p>