D3 Examples - Bar Chart 2: Wahlbeteiligung in Kölner Veedeln

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Cleaning Up</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
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            body {
                background-color: white;
                font-family: Tahoma, Arial, sans-serif;
            }
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            h1 {
                font-size: 20px;
                margin: 1;
                color: #4D4D4D;
            }
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            p {
                font-size: 16px;
                margin: 10px 0 0 0;
                color: #4D4D4D;
            }
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            svg {
                background-color: white;
            }
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            rect:hover {
                fill: #F16A6F;
            }
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            .axis path,
            .axis line {
                fill: none;
                stroke: #4D4D4D;
                shape-rendering: crispEdges;
            }
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            .axis text {
                font-family: sans-serif;
                font-size: 9px,
                font-weight: bold,
                font-color: #4D4D4D;
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            }
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            .y.axis path,
            .y.axis line {
                opacity: 0;
            }
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        </style>
    </head>
    <body>
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        <h1>Wahlbeteiligung in den Kölner Veedeln</h1>
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        <p>Kölner Veedel: Anteil Wahlbeteiligung an der Gesamtzahl der Wahlbeteiligten. Source: <a href="https://www.offenedaten-koeln.de/dataset/wahlbeteiligung-2014">Offene Daten Köln</a>, Kommunalwahl 2014</p>
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        <script type="text/javascript">
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            var w = 600;
            var h = 1600;
            var padding = [ 28, 10, 20, 200 ];  //Top, right, bottom, left
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            var widthScale = d3.scale.linear()
                                .range([ 1, w - padding[1] - padding[3] ]);
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            var heightScale = d3.scale.ordinal()
                                .rangeRoundBands([ padding[0], h - padding[2] ], 0.15);
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            var xAxis1 = d3.svg.axis()
                            .scale(widthScale)
                            .orient("top");
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            var xAxis2 = d3.svg.axis()
                            .scale(widthScale)
                            .orient("bottom");
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            var yAxis = d3.svg.axis()
                            .scale(heightScale)
                            .orient("left");
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            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
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            d3.csv("veedel.csv", function(data) {
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                data.sort(function(a, b) {
                    return d3.descending(+a.wahlbeteiligung, +b.wahlbeteiligung);
                });
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                widthScale.domain([ 0, d3.max(data, function(d) {
                    return +d.wahlbeteiligung;
                }) ]);
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                heightScale.domain(data.map(function(d) { return d.veedel; } ));
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                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
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                rects.attr("x", padding[3])
                    .attr("y", function(d) {
                        return heightScale(d.veedel);
                    })
                    .attr("width", function(d) {
                        return widthScale(d.wahlbeteiligung);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", "#8BDBD9")
                    .append("title")
                    .text(function(d) {
                        return d.wahlbeteiligung + "% Wahlbeteiligung in " + d.veedel;
                    });
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                svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
                    .call(xAxis2);
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                    svg.append("g")
                        .attr("class", "x axis")
                        .attr("transform", "translate(" + padding[3] + "," + padding[0] + ")")
                        .call(xAxis1);
​
​
                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + padding[3] + ",0)")
                    .call(yAxis);
​
            });
​
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        </script>
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    </body>
</html>
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