D3 Examples - Life expectancy at birth - Module 5 exercise [scatterplot]

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<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Module 5 Exercise -- Life Expectancy for all the countries.</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;
            }
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            h1 {
                font-size: 24px;
                margin: 0;
            }
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            p {
                font-size: 14px;
                margin: 10px 0 0 0;
            }
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            svg {
                background-color: white;
            }
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            circle:hover {
                fill: red;
            }
            
            .axis path,
            .axis line {
                fill: none;
                stroke: blue;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 11px;
            }
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        </style>
    </head>
    <body>
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        <h1>Life expectancy at birth in years</h1>
        <p>Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life.</p>
        <p>Source: <a href="https://data.worldbank.org/indicator/SP.DYN.LE00.IN">World Bank</a>, 2014</p>
        <div id="chart1960" style="float: left"></div>
        <div id="chart2012" style="float: left"></div>
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        <script type="text/javascript">
            var w = 600;
            var h = 600;
            var padding = [ 50, 10, 50, 50 ];  //Top, right, bottom, left
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            var xScale = d3.scale.linear()
                                .range([ padding[3], w - padding[1] - padding[3] ]);
            
            var yScale = d3.scale.linear()
                                .range([ padding[0], h - padding[2] ]);
​
            var yAxis = d3.svg.axis()
                            .scale(yScale)
                            .orient("left")
                            .tickFormat(function(d) {
                                return d;
                            });
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            function setupSVG(divelem, year) {
                var svg = d3.select(divelem)
                    .append("svg")
                    .attr("width", w)
                    .attr("height", h);
                svg.append("text")
                    .attr("x", (w / 2))             
                    .attr("y", 25)
                    .attr("text-anchor", "middle")  
                    .style("font-size", "16px") 
                    .style("text-decoration", "underline")  
                    .text("Life expectancy at birth in " + year);
                return svg;
            }
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            function setupChart(svg, data, year, yearForSorting) {
                data.sort(function(a, b) {
                    return d3.descending(+a[yearForSorting], +b[yearForSorting]);
                });
                yScale.domain([ 90, 20
                    /*d3.max(data, function(d) {
                        return +d[year];
                    }), 
                    d3.min(data, function(d) {
                        return +d[year];
                    })*/
                ]);
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                xScale.domain([data.length, 0]);
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                var circles = svg.selectAll("circle")
                                .data(data)
                                .enter()
                                .append("circle");
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                circles.attr("cx", function(d, i) {
                        return xScale(i);
                    })
                    .attr("cy", function(d) {
                        return yScale(d[year]);
                    })
                    .attr("r", 0.1)
                    .attr("fill", "orange")
                    .append("title")
                    .text(function(d) {
                        return d.CountryName + "'s life expectancy at birth is " + d[year];
                    });
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                circles.sort(function(a, b) {
                        return d3.ascending(+a[year], +b[year]);
                    })
                    .transition()
                    .ease('quad')
                    .delay(function(d, i) {
                        return i * 50;
                    })
                    .duration(1000)
                    .attr("r", 3);
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                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 10) + ",0)")
                    .call(yAxis);
            }
            var svg = setupSVG("#chart1960", "1960");
            var svg2012 = setupSVG("#chart2012", "2012");
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            d3.csv("LifeExpectancyAtBirth.csv", function(data) {
                console.table(data, ["CountryName", "1960", "2012"]);
                setupChart(svg, data, "1960", "2012");
                setupChart(svg2012, data, "2012", "1960");
            });
        </script>
​
    </body>
</html>
    