title: Matlab scatter two matrices - issue
body: <p>I am trying to figure out how scatter function works in matlab.
  For example , I have the two matrices:</p>
  
  <pre><code> mat1= rand(20,20)
   mat2= rand(20,20)
  </code></pre>
  
  <p>At this point I need to open a figure and use the “scatter” function to display a scatter plot of the values in mat1 versus the values in mat2.
  What I did is:</p>
  
  <pre><code>figure()
  scatter(mat1,mat2)
  </code></pre>
  
  <p>Obvious that is wrong. But I dont know how to do that. In addition I read the documentations about scatter function in matlab docs <a href="http://www.mathworks.com/help/matlab/ref/scatter.html" rel="nofollow">Scatter Function - MATLAB DOCS</a></p>
  
  <p>Suggestions are welcomed! thanks.</p>