Module 1

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Birds in the Netherlands</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
		<style type="text/css">
			
			body {
				background-color: antiquewhite;
				font-family: Helvetica, Arial, sans-serif;
			}

h1 
            {font-family: sans-serif;
             font-weight: 100;
             font-size: 20px;
             color: burlywood;
             padding-left: 50px; 
            } 
            
			p 
            {font-family: sans-serif;
             font-weight: 100;
             font-size: 11px;
             padding-left: 50px; 
            } 
             
            a:link {
				text-decoration: none;
				color: gray;
			}

a:hover {
				text-decoration: underline;
			}

a:visited {
				color: gray;
			}

a:active {
				color: steelBlue;
			}
        
            .line:hover  {
	            stroke: black;
                stroke-width:1.5;
            }
            
            text 
            {font-family: sans-serif;
             font-size: 9px;
            }
            
            svg {
				background-color: white;
			}
            
            #container {
				width: 700px;
				margin-left: auto;
				margin-right: auto;
				margin-top: 25px;
				padding: 25px;
				background-color: white;
				box-shadow: 1px 1px 1px 1px #ccc;  
            }

.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: sans-serif;
				font-size: 9px;
			}
            
            #tooltip {
                position: absolute;
                padding:2px;
                background-color: antiquewhite;
                -webkit-border-radius: 50px;
                -moz-border-radius: 50px;
                border-radius: 50px;
                pointer-events: none;
                
            }

#tooltip.hidden {
                display: none;
            }

#tooltip p {
                padding-left: 15px; 
                padding-right: 15px;
                font-family: sans-serif;
                font-size: 10px;
                line-height: 15px;
               
            }

</style>

</head>
	
    <body>

<div id="tooltip" class="hidden">
            <p><span id="value"></span></p>
        </div>
        
        
        <div id="container">
		  <h1>Birds in the Netherlands</h1>
          <p>How are the birdpopulations in the Netherlands developing over the years? </p>
          <p>Source: <a href="https://www.compendiumvoordeleefomgeving.nl/indicatoren/nl1194-Stadsvogels.html?i=4-34">Compendium voor de leeromgeving</a>, 2015</p>
        </div>

//Dimensions and padding
			var w = 700;
			var h = 400;
			var padding = [ 20, 10, 50, 100 ];  //Top, right, bottom, left

//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] - padding[3] ]);
			
			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) {
					return yScale(+d.amount);
				});

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

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

var years = ["1990", "1991", "1992", "1993", "1994", "1995", "1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004", "2005", "2006", "2007", "2008", "2009", "2010", "2011", "2012", "2013", "2014"];

//Create a new, empty array to hold restructured dataset
				var dataset = [];

//Loop once for each row in data
				for (var i = 0; i < data.length; i++) {

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

//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 birdindex data array
							//for this bird
							dataset[i].birdindex.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.birdindex, function(d) {
							return +d.amount;
						});
					}),
					0
				]);

//Make index=0 line (not very flexible yet)
 svg.append("line") 
        .attr("stroke", "black")
        .attr("x1", 100)
        .attr("y1", 192)
        .attr("x2", 600)
        .attr("y2", 192);

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

//Within each group, create a new line/path,
//binding just the birdindex data to each one
				groups.selectAll("path")
					.data(function(d) {
						return [ d.birdindex ];
		                    })	
                 	.enter()
                    .append("path")
                    .attr("class", "line")
                    .attr("stroke-width", 0)
                    .attr("stroke", "burlywood")
                    .attr("d", line)
					.attr("fill", "none")
                    .transition()  
                    .duration(2500)
                 	.attr("stroke-width", 1.5);
                
//Name bird                          
                groups.selectAll("path")
					.data(function(d) {
						return [ d.bird ];
                    })	               
                
//Tooltips             
                
                .on("mouseover", function(d) {

//location tooltip
                var xPosition = (d3.event.pageX);
                var yPosition = (d3.event.pageY-30);

//Update the tooltip position and value
                d3.select("#tooltip")
                  
                  .style("left", xPosition + "px")
                  .style("top", yPosition + "px")
                  .select("#value")
                  .text(d)

//Show the tooltip
                d3.select("#tooltip").classed("hidden", false);
                })

.on("mouseout", function() {

//Hide the tooltip
                d3.select("#tooltip").classed("hidden", true);

});                        
 
                
                 
//Axes
				svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(0," + (h - padding[2]) + ")")
					.call(xAxis);

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + (padding[3]) + ",0)")
					.call(yAxis);
                
                
 //y axis name       
                svg.append("text")  
                    .attr("x",(padding[3]-50))
                    .attr ("y", h/2-6)
                    .text("Index");      
 
                
 //x axis name       
                svg.append("text")  
                    .attr("x",w/2)
                    .attr ("y",h-10)
                    .text("Year");               
                
                
                
                
//End data load function
			});

</script>

</body>
</html>

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

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