Module 4 exercise: Free lunch in PBC public schools

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Module 4 exercise: Free lunch</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
		<style type="text/css">
			
			body {
				background-color: white;
			   	font-family: Helvetica, Arial sans-serif;
			}

h1 {
	        	font-size: 22px;
	        	margin: 20px 0 0 10px;
			}

p {
	        	font-size: 16px;
	        	margin: 10px 0 0 10px;
			}

svg {
				background-color: white;
			}

rect:hover{
				fill: blue;
			}

.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: Helvetica, Arial sans-serif;
				font-size: 14px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
	</head>
	<body>
		<h1>STUDENTS WHO QUALIFY FOR FREE LUNCH</h1>
		<p>More than half the students in Palm Beach County public schools qualify for free lunch. The percentage has risen steadily since 2008.</p>

var w = 700;
			var h = 600;
			var padding = [20, 10, 30, 120];

var widthScale = d3.scale.linear()
								.range([ 0, w - padding[1] - padding[3] ]);
			
			var heightScale = d3.scale.ordinal()
								.rangeRoundBands([ padding[0], h - padding[2] ], 0.1);

var xAxis = d3.svg.axis()
							.scale(widthScale)
							.orient("bottom");

var yAxis = d3.svg.axis()
							.scale(heightScale)
							.orient("left");

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

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

data.sort(function(a, b) {
					return d3.ascending(a.YEAR, b.YEAR);
				});

widthScale.domain([ 0, d3.max(data, function(d) {
					return +d.Percentfreelunch;
				}) ]);

heightScale.domain(data.map(function(d) { return d.YEAR; } ));

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

rects.attr("x", padding[3])
					.attr("y", function(d) {
						return heightScale(d.YEAR);
					})
					.attr("width", function(d) {
						return widthScale(d.Percentfreelunch);
					})
					.attr("height", heightScale.rangeBand())
					.attr("fill", "dodgerblue")
					.append("title")
					.text(function(d) {
						return d.Percentfreelunch + "% of students qualified for free lunch in " + d.YEAR;
					});

svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
					.call(xAxis);

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

});
		</script>
		<p>Source: <a href="https://nces.ed.gov/ccd/elsi/">National Center for Education Statistics</a></p>

</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js