NYC Eats, Bar Charts

<!DOCTYPE html>
<meta charset="utf-8">

<body>
	<h1>NYC Eats, Categorized</h1>
	<div class="mainContainer1"></div>
	<h1>NYC Eats, Neighborhoods</h1>
	<div class="mainContainer2"></div>
	<h1>NYC Eats, Chains</h1>
	<div class="mainContainer3"></div>
</body>

var margin = {top: 1, right: 60, bottom: 1, left: 120};

var width = 960 - margin.left - margin.right,
	height = 10 - margin.top - margin.bottom;

var xScale = d3.scale.linear()
	.range([0,width]);

function barChart(JSONdata, thisContainer, whatItIs) {

d3.json(JSONdata, function(error, data) {
		if (error) throw error;

var xcount = data.map( function (d) { return d.count; });
		var xMax = d3.max(xcount);
		xScale.domain([0,xMax]);

data.sort( function (a,b) { return b.count - a.count; });
		console.log(data);

var container = d3.select("body").select("div." + thisContainer).selectAll("svg.container")
			.data(data)
			.enter()
			.append("svg")
			.attr("class", "container")
			.attr("width", width + margin.left + margin.right)
			.attr("height", height + margin.top + margin.bottom);

var svgContainer = container.append("g")
			.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

svgContainer
			.append("rect")
			.attr("class", "bar")
			.attr("width", function (d) { return xScale(d.count); })
			.attr("height", height)
			.attr("x", 0)
			.attr("y", 0);
		svgContainer
			.append("text")
			.attr("class", "category_label")
			.attr("text-anchor", "end")
			.attr("dy", height-1)
			.attr("dx", -4)
			.text( function (d) { return d[whatItIs]; });
		svgContainer
			.append("text")
			.attr("class", "count_label")
			.attr("text-anchor", "start")
			.attr("dy", height-1)
			.attr("dx", function (d) { return xScale(d.count)+4; })
			.text( function (d) { return d.count; });

});

};

barChart("nycEats_categories.json", "mainContainer1", "category");
barChart("nycEats_neighborhoods.json", "mainContainer2", "neighborhood");
barChart("nycEats_chains.json", "mainContainer3", "key");

</script>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js