D3 Examples - Girls' skills in mathematics

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Creating SVG Elements from Data</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
        <style type="text/css">
            
            body {
                background-color: white;
                font-family: Verdana;
            }
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            svg {
                background-color: white;
            }
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            rect {
                fill: rgb(60, 161, 189);
            }
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            rect:hover { 
                fill: rgb(33, 93, 109);
            }
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            text {
                fill: white;
            }
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        </style>
    </head>
    <body>
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        <h1>Korean girls know how to count up</h1>
        <p>This dataset gives an insight about the mathematics skills of girls across 37 OECD countries.</p>
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        <script type="text/javascript">     
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            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", 700)
                        .attr("height", 1000);
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            d3.csv("OECD_ISA_2012.csv", function(data) {
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                data.sort(function(a,b){
                    return d3.descending (a.mathGirls, b.mathGirls);
                })
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            var rects = svg.selectAll("rect")
                    .data(data)
                    .enter()
                    .append("rect")
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                rects.attr("x", 0)
                    .attr("y", function(d, i){
                        return i * 25;
                    })
                    .attr("width", function(d){
                        return d.mathGirls;
                    })
                    .attr("height", 20)
                    .append("title")
                    .text(function(d){
                        return "Girls from "+d.country+" scored "+d.mathGirls+" points in mathematics"
                    });
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            var labels = svg.selectAll("text")
                    .data(data)
                    .enter()
                    .append("text")
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                labels.attr("x", 10)
                    .attr("y", function(d, i){
                        return i * 25+14;
                    })
                    .attr("font-size", 14)
                    .text(function(d){
                        return d.country;
                    })
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            });
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        </script>
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    </body>
</html>
    