title: how to display bottom data for row chart using dc.js
body: <p>I'm making a rowchart using the Dimensional Charting javascript library dc.js, which is based on d3 and crossfilter. i am  display the rowchart for top(10) data.but i am trying to display rowchart for bottom(10) data but graph can be display same as the top(10) data.how to display bottom(10) data.  </p>
  
  <pre><code>  constRowChart.width(350)
      .height(1000)
      .margins({top: 20, left: 120, right: 10, bottom: 20})
      .transitionDuration(750)
      .dimension(density)
      .group(const_total)
      .renderLabel(true)
      .gap(1)
      .title(function (d) {
          return "";
      })
      .elasticX(true)
      .colors(d3.scale.category20c())
      .ordering(function(d) { return d.value })
      .xAxis().ticks(3).tickFormat(d3.format("s"));
  
  constRowChart.data(function (group) {
      return group.top(10);
  });
  </code></pre>