Module 5 exercise: Free lunch and non-white population in Palm Beach County Schools

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Module 5 exercise: Free lunch and non-population</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;
			}

circle:hover{
				fill: red;
			}

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

</style>
	</head>
	<body>
		<h1>STUDENTS WHO QUALIFY FOR FREE LUNCH</h1>
		<p>The percentage of Palm Beach County public school students who qualify for free lunch has risen steadily since 2008, as has the percentage of non-white students.</p>

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

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")
							.ticks(10)
							.tickFormat(function(d) {
								return d + "%";
							});

var yAxis = d3.svg.axis()
							.scale(yScale)
							.orient("left")
							.ticks(10)
							.tickFormat(function(d) {
								return d + "%";
							});

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

d3.csv("FRlunch-nonwhite.csv", function(data) {

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

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

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

circles.attr("cx", function(d) {
						return xScale(d.Percentfreelunch);
					})
					.attr("cy", function(d) {
						return yScale(d.Percentnonwhite);
					})
					.attr("r", 0.1)
					.attr("fill", "dodgerblue")
					.append("title")
					.text(function(d) {
						return d.Percentfreelunch + "% of students qualified for free lunch in " + d.YEAR + ", and " + d.Percentnonwhite + "% of students were nonwhite";
					});

circles.sort(function(a, b) {
						return d3.ascending(+a.Percentnonwhite, +b.Percentnonwhite);
					})
					.transition()
					.delay(function(d, i) {
						return i * 50;
					})
					.duration(1000)
					.attr("r", 5);

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>
		<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