Assignment 4

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Greenhouse gas emissions</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: red;
			}

.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}

.axis text {
				font-family: sans-serif;
				font-size: 11px;
			}

</style>
	</head>
	<body>

<h1>Greenhouse gas emissions (1990 - 2012)</h1>

<p>Greenhouse gas emissions from 1990 - 2012 by OECD country. The unit is in houndred thousands tonnes of CO2 equivalent. Source: <a href="https://www.oecd-ilibrary.org/environment/data/oecd-environment-statistics/greenhouse-gas-emissions_data-00594-en">OECD</a>, 2015</p>

var w = 700;
			var h = 600;
			var padding = [ 50, 10, 50, 100 ];  //Top, right, bottom, left
			var year = "1990";
			var year2 = "2012";

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(15);

var yAxis = d3.svg.axis()
							.scale(yScale)
							.orient("left")
							.ticks(15);

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

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

xScale.domain([
					d3.min(data, function(d) {
						return +d[year]/1000;
					}),
					d3.max(data, function(d) {
						return +d[year]/1000;
					})
				]);

yScale.domain([
					d3.max(data, function(d) {
						return +d[year2]/1000;
					}),
					d3.min(data, function(d) {
						return +d[year2]/1000;
					})
				]);

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

circles.attr("cx", function(d) {
						return xScale(+d[year]/1000);
					})
					.attr("cy", function(d) {
						return yScale(+d[year2]/1000);
					})
					.attr("r", 0.1)
					.attr("fill", "green")
					.append("title")
					.text(function(d) {
						return d.Country + "'s greenhouse gas emissions 1990 is " + d[year] + ", and 2012 " + d[year2] + "";
					});

circles.sort(function(a, b) {
						return d3.ascending(+a[year], +b[year]);
					})
					.transition()
					.delay(function(d, i) {
						return i * 50;
					})
					.duration(2000)
					.attr("r", 4);

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);

svg.append("text")
			    .attr("class", "x label")
			    .attr("text-anchor", "end")
			    .attr("x", w/2+100)
			    .attr("y", h)
			    .text("emissions (1990)");

svg.append("text")
				  .attr("class", "y label")
				  .attr("text-anchor", "end")
				  .attr("y", 6)
					.attr("x", -(h/2-100))
				  .attr("dy", ".75em")
				  .attr("transform", "rotate(-90)")
				  .text("emissions (2012)");

});

</script>

</body>
</html>

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

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