title: scatter plot in matplotlib
body: <p>This is my first matplotlib program, so sorry for my ignorance.</p>
  
  <p>I've two arrays of string. say, <code>A = ['test1','test2']</code> and <code>B = ['test3','test4']</code>. 
  If any correlation exists between <code>A</code> and <code>B</code> element, their corr value will be set to <code>1</code>.</p>
  
  <pre><code>        test1 | test2
  test3 |   1   |   0
  
  test4 |   0   |   1
  </code></pre>
  
  <p>Now, I want to draw a scatter diagram where my X axis will be elements of <code>A</code>, Y axis will be elements of <code>B</code> and if correlation value is <code>1</code>, it'll be marked in the scattered plot. how to do that?</p>