module3/6_titles.html

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Adding Tooltips</title>
		<script type="text/javascript" src="../d3.v3.js"></script>
		<style type="text/css">
			
			body {
				background-color: #ddddff;
			}

			svg {
				background-color: white;
			}

		</style>
	</head>
	<body>

		<script type="text/javascript">		


			var svg = d3.select("body")
						.append("svg")
						.attr("width", 300)
						.attr("height", 400);


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

				data.sort(function(a, b) {
					return d3.descending(a.lifeSatisfaction, b.lifeSatisfaction);

					//If your numeric values aren't sorting properly,
					//try commenting out the line above, and instead using:
					//
					//return d3.descending(+a.lifeSatisfaction, +b.lifeSatisfaction);
					//
					//Data coming in from the CSV is saved as strings (text),
					//so the + signs here force JavaScript to treat those
					//strings instead as numeric values, thereby fixing the
					//sort order (hopefully!).
				});

				var rects = svg.selectAll("rect")
								.data(data)
								.enter()
								.append("rect");

				rects.attr("x", 0)
					.attr("y", function(d, i) {
						return i * 10;
					})
					.attr("width", function(d) {
						return d.lifeSatisfaction * 30;
					})
					.attr("height", 8)
					.append("title")
					.text(function(d) {
						return d.country + "'s life satisfaction score is " + d.lifeSatisfaction;
					});

			});


		</script>

	</body>
</html>