anchor.diff:  		var boroughCounts = borough.group().reduceCount();
   
   		var timeScale = d3.time.scale().domain([(new Date(2010,12,31)), (new Date(2014,10,01))]);
  -
  -		// colorScale.domain([dc.utils.groupMin(zipCodeCounts, function(d) { return d.value; }),
  -		// 	dc.utils.groupMax(zipCodeCounts, function(d) { return d.value; })]);
   
   		d3.json("data/nyc-zip-code.json", function(nycZipJson) {
   
  
positive.code: 			<a class="reset" href="javascript:choropleth.filterAll();dc.redrawAll();" style="display: none;">reset</a>
  		</div>
  	</div>
  	<aside>
  		<div id="histogram">
  			<div>
  				<h2>By Month</h2>
  
negative.code: 
  			keys.enter().append('li')
  			    .attr('class', 'key')
  			    .style('border-right-color', String)
  			    .text(function(d) {
  			        var r = colorScale.invertExtent(d);
  			        return formatCount(r[0]);
  			    });
  
  			histogram.width(histWidth)
  				.height(histHeight)
  				.margins({top: 10, right: 10, bottom: 20, left: 40})
  				.dimension(time)
  				.group(timeCounts)
  