title: How to check Polynomial Regression result in RapidMiner?
body: <p>I use <strong>RapidMiner</strong> and i have a data set which contains 40 lines, each line has 14 column.
  Lines are different kinds of metrics of Android applications + and the end of the line there is google-play ranking (first line is the header which contains the name of metrics).</p>
  
  <p>(So the goal is predict google play ranking from metrics.)</p>
  
  <p>The data set: <a href="http://pastebin.com/Cw1BR4K6" rel="nofollow">http://pastebin.com/Cw1BR4K6</a></p>
  
  <ul>
  <li>column 1-13: different kind of metrics</li>
  <li>column 14: google play ranking</li>
  <li>line 2-40: metrics of Android projects</li>
  </ul>
  
  <p>I used <strong>PolynomialRegression</strong> in RapidMiner and i got this result:</p>
  
  <pre><code>- 6.723 * lloc ^ 1.000
  + 1.187 * nid ^ 2.000
  - 47.730 * nle ^ 1.000
  - 36.433 * nel ^ 1.000
  - 1.466 * nip ^ 2.000
  - 97.187 * activites ^ 1.000
  - 50.080 * inside-permissions ^ 1.000
  - 60.291 * outside-permissions ^ 1.000
  - 52.472 * all-permissions ^ 4.000
  - 2.309 * jtlloc ^ 1.000
  + 36.058 * jtnm ^ 1.000
  + 9.924 * jtna ^ 1.000
  + 40.504 * jtncl ^ 1.000
  + 9.455
  </code></pre>
  
  <p><strong>My question:</strong>
  How can i check that this result is correct?
  How can i check this result to an already available line?
  For example i would like to apply this result to the line 25: 25,8,5,10,0,1,0,0,0,239,10,14,4,3.8</p>
  
  <p><strong>My other question:</strong>
  What are the methods which i can do predicts about this set?
  And what is the best methods to do it? I would like ask you to explain it to me, if it is possible.</p>
  
  <p><em>Thanks in advance, Peter</em></p>