Scatterplot D3

<!DOCTYPE html>
<html lang = "en">
	<head>
		<meta charset="utf-8">
		<title>A scatterplot comparing population and disease count</title>
		<script src = "https://d3js.org/d3.v4.min.js"></script>
		<style type="text/css">
		</style>
	</head>
	<body>
		<h3> Scatterplot of Population vs Number of Reported Diseases </h3>
		<script type = "text/javascript">
			//Width and height"
			var w = 700;
			var h = 500;
			var padding = 75;

var xScale = d3.scaleLinear();

var yScale = d3.scaleLinear();

var xAxis = d3.axisBottom()
							.scale(xScale)
							.ticks(7);

var yAxis = d3.axisLeft()
							.scale(yScale)
							.ticks(7);

//Create SVG element
			var svg = d3.select("body")
						.append("svg")
						.attr("width",w)
						.attr("height",h);

//converts the data to integers
			var rowConverter = function(d) {
				return {
					number: parseInt(d.number),
					population: parseInt(d.population)
				}
			}

d3.csv("health.csv", rowConverter, function(data) {
				dataset = data;

xScale.domain([0, d3.max(dataset, function(d) {return d.population;})])
						.range([padding,w-padding * 2]);
				yScale.domain([0, d3.max(dataset, function(d) {return d.number;})])
						.range([h-padding,padding]);
				svg.selectAll("circle")
					.data(dataset)
					.enter()
					.append("circle")
					.attr("cx",function(d) {
						return xScale(d.population);
					})
					.attr("cy", function(d) {
						return yScale(d.number);
					})
					.attr("r", function(d) {
						return 2; //set all points to radius 2
					});

svg.append("g") 
					.attr("class", "axis") 
					.attr("transform", "translate(0," + (h-padding) + ")") 
					.call(xAxis)

svg.append("g")
					.attr("class", "axis")
					.attr("transform", "translate(" + padding + ",0)")
					.text("Disease Count")
					.call(yAxis);

svg.append("text") 
					.attr("transform", "translate (" + 15 + "," + (h/2) + ") rotate(-90)")
					.attr("text-anchor", "middle")
      				.text("Disease Count")
      				.attr("fill", "black");

svg.append("text") 
					.attr("x", w/2 )
					.attr("y", h - 10)
					.attr("text-anchor", "middle")
      				.text("Population")
      				.attr("fill", "black");

});

</script>
	</body>
</html>