ex 5 - lobbying costs and number of people lobbying - with transitions

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Lobbying costs</title>
		<script type="text/javascript" src="https://d3js.org/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: orange;
			}

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

</style>
	</head>
	<body>

<h1>Lobbying Costs</h1>

<p> Millions of euros spent for lobbying (x-axis) and number of lobbyists (y-axis). Source: <a href="https://lobbyfacts.eu/reports/expenditure/companies">LobbyFacts.eu</a>, 2015</p>

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")
							.ticks(7)
							.tickFormat(function(d) {
								return d + " M";
							});

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

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

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

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

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

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

circles.attr("cx", function(d) {
						return xScale(d.LobbyingCosts);
				})
					.attr("cy", function(d, i) {
						return yScale(d.NumberLobbyists);
					})
					.attr("r",0.1)
					.attr("fill", "red")
					.append("title")
					.text(function(d) {
						return d.OrganisationName + " operates in " + d.CountryOfContact + " and spent " + d.LobbyingCosts + " euros in lobbying";
					});
				
				circles.sort(function(a, b) {
						return d3.descending(+a.NumberLobbyists, +b.NumberLobbyists);
					})
					.transition()
					.delay(function(d, i) {
						return i * 50;
					})
					.duration(2000)
					.attr("r", 7)
					.attr("fill", "steelblue")
					.attr("opacity", 0.3);

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] - 5) + ",0)")
					.call(yAxis);

});

</script>

</body>
</html>

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

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