title: What is the idiomatic way to obtain a sequence of columns from an incanter dataset?
body: <p>What's the best way to get a sequence of columns (as vectors or whatever) from an Incanter data set?</p>
  
  <p>I thought of:</p>
  
  <pre><code>(to-vect (trans (to-matrix my-dataset)))
  </code></pre>
  
  <p>But Ideally, I'd like a lazy sequence.  Is there a better way?</p>