title: How to plot a matrix in scatterplot python
body: <p>I have a matrix A:</p>
  
  <pre><code>    A = np.matrix(np.random.rand(4,2))
  
  
      matrix([[ 0.01124212,  0.45879116],
              [ 0.10993219,  0.00142847],
              [ 0.34650295,  0.98693131],
              [ 0.20417694,  0.81177707]])
  </code></pre>
  
  <p>Is there an easy way to use matplotlib (or similar libary) to show a scatterplot in 2-d? When I use <code>plt.plot(A)</code> it shows as a line graph.</p>