title: d3 x axis too short for scatterplot content
body: <p>I'm having trouble with my X axis width on a D3 scatterplot - what's happening is that my x-axis isn't filling the space allotted, that the Data happily fill. JSfiddle here: <a href="http://jsfiddle.net/u4cGJ/" rel="nofollow">http://jsfiddle.net/u4cGJ/</a></p>
  
  <p>I've defined my d3 scale's output range thusly:</p>
  
  <pre><code>.range([padding, svgWidth - padding]);
  </code></pre>
  
  <p>and the output range of points on the scatterplot perfectly lines up with this, but the x-axis doesn't - it stops short of the range of points displayed, - it's doing exactly what I tell it to do, and yet, as the svg extends farther out, the data fill in that space too, leaving a section of data that are visible, but not being placed in context of an axis. </p>
  
  <p>Thanks for any help you can offer!</p>