education.csv

index.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>education</title>
		<script type="text/javascript" src="../../d3.v3.js"></script>
		<style type="text/css">
			
			body {
				background-color: white;
				font-family: Helvetica, Arial, sans-serif;
			}

			h1 {
				font-size: 24px;
				margin: 0;
			}

			p {
				font-size: 14px;
				margin: 10px 0 0 0;
			}

			svg {
				background-color: white;
			}

			circle:hover {
				fill: green;
			}
			
			.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: sans-serif;
				font-size: 11px;
			}

		</style>
	</head>
	<body>

		<h1>education expenditure and unemployment rates in 2012 source: world bank</h1>

		<p1>the x axis = government expenditure on education (% of GDP). </p1>

		<p2>the y axis = unemployment rate of total labor force (%).</p2> 

		<script type="text/javascript">		


			var w = 700;
			var h = 600;
			var padding = [ 20, 10, 50, 50 ];  //Top, right, bottom, left



			var xScale = d3.scale.linear()
								.range([ padding[3], w - padding[1] - padding[3] ]);
			
			var yScale = d3.scale.linear()
								.range([ padding[0], h - padding[2] ]);



			var xAxis = d3.svg.axis()
							.scale(xScale)
							.orient("bottom")
							.tickFormat(function(d) {
								return d + "%";
							});

			var yAxis = d3.svg.axis()
							.scale(yScale)
							.orient("left")
							.tickFormat(function(d) {
								return d + "%";
							});



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



			d3.csv("education.csv", function(data) {

				xScale.domain([ 
					d3.min(data, function(d) {
						return +d.educationexpenditure;
					}), 
					d3.max(data, function(d) {
						return +d.educationexpenditure;
					})
				]);

				yScale.domain([
					d3.max(data, function(d) {
						return +d.unemploymentrate;
					}),
					d3.min(data, function(d) {
						return +d.unemploymentrate;
					})
				]);

				var circles = svg.selectAll("circle")
								.data(data)
								.enter()
								.append("circle");

				circles.attr("cx", function(d) {
						return xScale(d.educationexpenditure);
					})
					.attr("cy", function(d) {
						return yScale(d.unemploymentrate);
					})
					.attr("r", 0.1)
					.attr("fill", "green")
					.append("title")
					.text(function(d) {
						return d.country + "'s education expenditure is " + d.educationexpenditure + ", and " +  "unemployment rate is " + d.unemploymentrate;
					});

					circles.transition()
					.delay(function(d,i){
						return i*100;
					})
					.duration(3000)
					.attr("r", 5)
					.attr("fill", "purple");

				svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(0," + (h - padding[2] + 10) + ")")
					.call(xAxis);

				svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + (padding[3] - 10) + ",0)")
					.call(yAxis);

			});


		</script>

	</body>
</html>