Module 6 exercise - Global refugee data

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Line Chart with Multiple Lines</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;
				font-weight: bold;
				margin-left: 50px;
			}

h1 {
				font-family: Helvetica, Arial, sans-serif;
				font-size: 24px;
				margin: 0;
				color: #323232;
			}

p {
				font-family: Helvetica, Arial, sans-serif;
				font-size: 14px;
				color: #323232;
				margin: 10px 0 0 0;
			}

svg {
				background-color: #323232;
			}

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

.axis text {
				fill: white;
				font-family: sans-serif;
				font-size: 11px;
			}
			.countryName {
				font-weight: bold;
				font-size: 14px;
				color: white;
			}
			.toolTip {
				padding: 6px;
				background-color: #323232;
				border-radius: 4px;
				position: absolute;
				font-size: 12px;
				color: #ff9900;
				line-height: 18px;
				visibility: hidden;
			}
			.subhead {
				fill: white;
				font-size: 14px;
			}

</style>
	</head>
	<body>
		<div class="toolTip"></div>
		<h1>Refugee intake by Country</h1>

<p>
			Refugee intake for selected countries, 2000-2013. Source: <a href="https://popstats.unhcr.org/#_ga=1.152203577.1033056182.1429126874">UNHCR</a>
		</p>
		<br/>

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

//Set up scales
			var xScale = d3.time.scale().range([padding[3], w - padding[1] - 50]);

var yScale = d3.scale.linear().range([padding[0], h - padding[2]]);

//Configure axis generators
			var xAxis = d3.svg.axis().scale(xScale).orient("bottom").ticks(15).tickFormat(function(d) {
				return dateFormat(d);
			});

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) {
				console.log(+d.amount);
				return yScale(+d.amount);

}).interpolate("cardinal");

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

//create axis labels
			svg.append('text').text('Number of refugees').attr('transform', function(d) {
				return "rotate(-90 0, 360)"
			}).attr('x', 0).attr('y', h / 2 + 15).attr('text-anchor', 'middle').attr('class', 'y subhead').attr('opacity', 1)

svg.append('text').text('Year').attr('x', w / 2).attr('y', h - 15).attr('text-anchor', 'middle').attr('class', 'x subhead').attr('opacity', 1)

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

//Data is loaded in, but we need to restructure it.
				//Remember, each line requires an array of x/y pairs;
				//that is, an array of arrays, like so:
				//
				//	[ [x: 1, y: 1], [x: 2, y: 2], [x: 3, y: 3] ]
				//
				//We, however, are using 'year' as x and 'amount' as y.
				//We also need to know which country belongs to each
				//line, so we will build an array of objects that is
				//structured like this:
				/*

[
				{
				country: "Australia",
				refugees: [
				{ year: 1961, amount: 90589.568 },
				{ year: 1962, amount: 94912.961 },
				{ year: 1963, amount: 101029.517 },
				�
				]
				},
				{
				country: "Bermuda",
				refugees: [
				{ year: 1961, amount: 176.016 },
				{ year: 1962, amount: 157.681 },
				{ year: 1963, amount: 150.347 },
				�
				]
				},
				�
				]

*/
				//Note that this is an array of objects. Each object
				//contains two values, 'country' and 'refugees'.
				//The 'refugees' value is itself an array, containing
				//more objects, each one holding 'year' and 'amount' values.

//New array with all the years, for referencing later
				var years = ["2000", "2001", "2002", "2003", "2004", "2005", "2006", "2007", "2008", "2009", "2010", "2011", "2012", "2013"];

//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,
						refugees : []
					};

//Loop through all the years
					for (var j = 0; j < years.length; j++) {

// If value is not empty
						if (data[i][years[j]]) {
							//Add a new object to the refugees data array
							//for this country
							dataset[i].refugees.push({
								year : years[j],
								amount : data[i][years[j]]
							});
						}

}

//Set scale domains
				xScale.domain([d3.min(years, function(d) {
					return dateFormat.parse(d);
				}), d3.max(years, function(d) {
					return dateFormat.parse(d);
				})]);

yScale.domain([d3.max(dataset, function(d) {
					return d3.max(d.refugees, function(d) {
						return +d.amount;
					});
				}), 0]);

//Make a group for each country
				var groups = svg.selectAll("g").data(dataset).enter().append("g");

//Append a title with the country name (so we get easy tooltips)
				/*groups.append("title")
				.text(function(d) {
				return d.country;
				});*/

//Within each group, create a new line/path,
				//binding just the refugees data to each one
				var paths = groups.selectAll("path").data(function(d) {
					return [d.refugees];
				}).enter().append("path");

paths.attr("class", "line").attr("d", line).attr("fill", "none").attr("stroke", "#ffc04c").attr("stroke-width", 2).style('opacity', '0.8').style('cursor', 'pointer');

paths.on('mouseover', function() {
					d3.select(this).classed('hover', true).attr('stroke-width', 4).attr('stroke', 'white')
				}).on('mouseout', function() {
					d3.select(this).classed('hover', false).attr('stroke-width', 2).attr('stroke', '#ffc04c')
				});

//hover action on lines
				groups.on('mouseover', function(d) {
					tt = d3.select('.toolTip');
					tt.html('<span class="countryName">' + d.country + '</span>').style('left', d3.event.pageX + 10 + 'px').style('top', d3.event.pageY + 10 + 'px').style('visibility', 'visible');
				}).on('mouseout', function() {
					tt.style('visibility', 'hidden')

})
				//Axes
				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>

</body>
</html>

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

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