Scatter Plot - Module 5

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Module 5</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
		<style type="text/css">
			
			body {
				background-color: beige;
			}

svg {
				background-color: white;
			}

}

h1 {
				font-size: 24px;
				font-family: sans-serif;
				margin: 0;
			}

p {
				font-family: sans-serif;
				font-size: 14px;
				margin: 10px 0 0 0;
			}

.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: sans-serif;
				font-size: 9px;
			}

circle:hover {
				fill: blue;
			} /* fill with some color when the mouse is passing through */

</style>
	
	</head>
	
	<body>

<h1>Scatter Plot - Module 5</h1>

<p> Scatter Plot showing the expectancy of life vs. the number of years of education. </p>

var w = 400;
			var h = 500;

//padding (margins): setting a room for the axis

var padding = [20,10,20,50]; // Top, right, bottom, left

//setting the domain

var xscale = d3.scale.linear().range([ padding[3], w - padding[1] ]);

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

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

var xAxis = d3.svg.axis().scale(xscale).orient("bottom").ticks(15); //ticks: add recomendations to d3, for example the number of "divisions" in the x axis

var yAxis = d3.svg.axis().scale(yscale).orient("left");

//If you need to format the axis with percentages use this:

/* .tickFormat (function(d){
	               return d + "%";
			});*/

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

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

});

//setting the domains

xscale.domain([ 
					d3.min(data, function(d) {
						return +d.lifeExpectancy;
					}), 
				    d3.max( data, function(d){
				        return +d.lifeExpectancy;
			        })
			    ]);

// using max and min to avoid that the points acumulate in ust one point of the graphic
			    //set as the first number of the scale the max and the last one, the min (for y axis) - the first number in the top originally starts in 0

yscale.domain([
			    	d3.max( data, function(d){
				        return +d.yearsInEducation;
			        }),			    
			        d3.min(data, function(d) {
						return +d.yearsInEducation;
					}) 
			    ]);

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

circles.attr("cx", function(d){
					return xscale(d.lifeExpectancy);
				})
					.attr("cy", function(d, i) { //set where each bar is going to beggining
						return yscale(d.yearsInEducation);
					})
					.attr("r", 0.1)					
					.attr("fill", "firebrick")
					.append("title")
					.text(function(d) {
						return d.country + "'s life expectancy and years of education is, respectively, " + d.lifeExpectancy + " and " + d.yearsInEducation;
					})

circles.sort(function(a, b) {
						return d3.ascending(+a.lifeExpectancy, +b.lifeExpectancy);
					})
					.transition()
					.delay(function(d, i) {
						return i * 50; //delay for the transition happens
					})
					.duration(2000).attr("r",4); //setting transition (obs: the durations is in ms)

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] - 5) + ",0)").call(yAxis);

});

</script>

</body>
</html>

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

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