creating axes

public/js/app.js

@@ -125,3 +125,6 @@ var attachDragHandlers = function(){
 	//attach drag behavior to circle elements
 	d3.selectAll('circle').call(drag);
 };
+
+d3.select('svg').append('g').attr('transform', 'translate(0,' + HEIGHT + ')').call(d3.axisBottom(xScale));
+d3.select('svg').append('g').call(d3.axisLeft(yScale));