title: Load list into numpy matrix
body: <p>How would I go about loading a list into a numpy matrix, with different rows/columns.</p>
  
  <p>I.e.</p>
  
  <pre><code>i=[1,2,3,4,5,6,7,8,9] 
  </code></pre>
  
  <p>would be loaded in for example as </p>
  
  <pre><code>np.matrix([[1,2,3],[4,5,6],[7,8,9]]
  </code></pre>