title: Different color for each set in scatter plot on matplotlib
body: <p>I have two samples sets from a multivariate normal distribution:
  ¿How could I set a different color for each set in scatter plot on matplotlib? Eg. printing values from A1 in  blue and values from A2 in red.</p>
  
  <pre><code>N= 4
  A1 = np.random.multivariate_normal(mean=[1,-4], cov=[[2,-1],[-1,2]],size = N)
  A2 = np.random.multivariate_normal(mean=[1,-3], cov=[[1,1.5],[1.5,3]],size= N) 
  
  &gt;&gt;&gt;print A1
  [[ 0.16820131 -2.14909926]
   [ 0.57792273 -2.43727122]
   [-0.06946973 -3.72143292]
   [ 2.59454949 -5.34776438]]
  
  &gt;&gt;&gt;print A2
  [[ 0.98396671 -1.68934158]
  [-0.33756576 -3.28187214]
  [ 1.49767632 -3.46575623]
  [ 1.47036718 -1.58453858]]
  </code></pre>
  
  <p>Could someone help me? Thanks in advance.</p>