GDP line chart

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	<head>
		<meta charset="utf-8">
		<title>GDP per capita in Europe</title>
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	<body>

<h1>Long-term evolution of GDP per capita in Europe</h1>

<p>Gross Domestic Product (GDP) per capita for European countries between 1870 and 2010.<br>
            <strong>Move your mouse over the name of a country in the list to highlight it's curve.</strong><br>
            Based on  <a href="https://www.ggdc.net/maddison/maddison-project/home.htm">Angus Maddison's data</a>, updated in 2013.</p>
        
        <div id="country_list"></div>

//Dimensions and padding
			var w = 700;
			var h = 500;
			var padding = [ 20, 10, 50, 100 ];  //Top, right, bottom, left

//Set up date formatting and years
			var dateFormat = d3.time.format("%Y");

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			var xScale = d3.time.scale()
								.range([ padding[3], w - padding[1] - padding[3] ]);
			
			var yScale = d3.scale.linear()
								.range([ padding[0], h - padding[2] ]);

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			var xAxis = d3.svg.axis()
							.scale(xScale)
							.orient("bottom")
							.ticks(15)
							.tickFormat(function(d) {
								return dateFormat(d);
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var yAxis = d3.svg.axis()
							.scale(yScale)
							.orient("left");

//Configure line generator
			var line = d3.svg.line()
				.x(function(d) {
					return xScale(dateFormat.parse(d.year));
				})
				.y(function(d) {
					return yScale(+d.amount);
				});

//Create the empty SVG image
			var svg = d3.select("body")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

//Load data
			d3.csv("gdppercapita.csv", function(data) {

//Create a new, empty array to hold our restructured dataset
				var dataset = [];
                
				//Loop once for each row in data
				for (var i = 0; i < data.length; i++) {

//Create new object with this country's name and empty array
					dataset[i] = {
						country: data[i].country,
						gdp: []
					};

//Loop through all the years
					for (var j = 1870; j < 2011; j++) {
						// If value is not empty
						if (data[i][j.toString()]) {
							//Add a new object to the GDP data array
							//for this country
							dataset[i].gdp.push({
								year: j.toString(),
								amount: data[i][j.toString()]
							});
						}

}

//Set scale domains
				xScale.domain([dateFormat.parse("1870"), dateFormat.parse("2010")]);
                
				yScale.domain([ 
					d3.max(dataset, function(d) {
						return d3.max(d.gdp, function(d) {
							return +d.amount;
						});
					}),
                    0
				]);

//Make a group for each country
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				groups.append("title")
					.text(function(d) {
						return d.country;
					});
                
				//Within each group, create a new line/path,
				//binding just the emissions data to each one
				groups.selectAll("path")
					.data(function(d) {
						return [ d.gdp ];
					})
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					.attr("stroke-width", 2);

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                    .attr("text-anchor", "end")
                    .attr("x", w-padding[3])
                    .attr("y", h - 55)
                    .text("Years");
                svg.append("text")
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                    .attr("text-anchor", "end")
                    .attr("y", padding[2] + 62)
                    .attr("x", -(padding[2] - 30))
                    .attr("transform", "rotate(-90)")
                    .text("GDP per capita (1990 Int. GK$)");
                
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