title: Parallel coordinates with d3.js
body: <p>I need to to represent a Parallel Coordinates with d3.js. First of all I have no idea if what I think is possible to achieve (and if the Parallel Coordinates is the right chart). 
  I will explain my idea: I take data from a database and I expose them in a JSON and I store them in an array of objects (with JavaScript). 
  This is an example of the data <a href="http://pastebin.com/DZcMqDMc" rel="nofollow">http://pastebin.com/DZcMqDMc</a>. 
  I would like to represent along the abscissa axis years (though there are years repeating themself, as you can see from data example), while along the ordinate axis values of those years (values are in percent, ranging from 1 to 100). 
  I would like to represent two lines according to "value1" and "value2" property in the JSON file.
  Is it possible? Is Parallel Coordinates the right chart?</p>
  
  <p>The main problem I have right now is that I do not understand how to set right the two domains (abscissa and ordinate).
  I am basing on the example Parellel Coordinates of Bostock.</p>
  
  <p>For abscissa I am thinking something like that:</p>
  
  <pre><code>x.domain(
      d3.extent(test, 
          function(d) {
              return d.years;
          }
      )
  );
  </code></pre>
  
  <p>It makes sense or?</p>