D3-course-oct-2015 Renewable Energy

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<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Bar Chart, Framed</title>
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		<link href="style.css" rel="stylesheet" type="text/css" />
		
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<h1>Use of renewable energy</h1>

<p>Use of renewable energy in % of total energy generation. <strong>Source:</strong> <a href="https://data.oecd.org/energy/renewable-energy.htm#indicator-chart" target="_blank">OECD</a>, 2015</h3></a></p>

</div>

var w = 700;
			var h = 900;
			var padding = [ 20, 10, 30, 100 ];  //Top, right, bottom, left

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");

//Now SVG goes into #container instead of body
			var svg = d3.select("#container")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

d3.csv("renewable-energy.csv", function(data) {

data.sort(function(a, b) {
					return d3.descending(+a.y2012, +b.y2012);
				});

widthScale.domain([ 0, d3.max(data, function(d) {
					return +d.y2012;
				}) ]);

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

//Bind data to groups (not bars directly)
				var groups = svg.selectAll("g")
								.data(data)
								.enter()
								.append("g")
								.attr("class", "bar");

//Add a rect to each group
				var rects = groups.append("rect")
					.attr("x", padding[3])
					.attr("y", function(d) {
						return heightScale(d.country);
					})
					.attr("width", 0)
					.attr("height", heightScale.rangeBand())
					.attr("fill", "#fff");

//Add a text element to each group
				groups.append("text")
					.attr("x", function(d) {
						return padding[3] + widthScale(d.y2012) - 3;
					})
					.attr("y", function(d) {
						return heightScale(d.country) + 11;
					})
					.text(function(d) {
						return d.y2012;
					});

rects.transition()
					.delay(function(d, i) {
						return i * 50;
					})
					.duration(1000)
					.attr("width", function(d) {
						return widthScale(d.y2012);
					});

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>

</body>
</html>

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