D3 Examples - Barchart with custom baseline

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Module 4 - Exercise</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: Helvetica, Arial, sans-serif;
        }
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        h1 {
            font-size: 20px;
            margin: 0;
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        }
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        p {
            font-size: 12px;
            margin: 10px 0 10px 0;
        }
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        svg {
            background-color: white;
        }
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        rect:hover {
            fill: #5ab4ac;
        }
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        .axis path,
        .axis line {
            fill: none;
            stroke: black;
            shape-rendering: crispEdges;
        }
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        .axis text {
            font-family: sans-serif;
            font-size: 12px;
        }
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        .y.axis path,
        .y.axis line {
            opacity: 0;
        }
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        </style>
    </head>
    <body>
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<h1> <b> Investing in society </b> </h1>
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<p>Social expenditure in OECD countries in 2011 (as % of GDP). <a href="https://www.oecd-ilibrary.org/social-issues-migration-health/data/social-expenditure/aggregated-data_data-00166-en"> Explore the data </a> </p>
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        <script type="text/javascript">
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            var w = 600;
            var h = 650;
            var padding = [ 20, 10, 30, 120 ];
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            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
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            var widthScale = d3.scale.linear()
                        .range([ 0, w - padding[1] - padding[3] ]);
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            var heightScale = d3.scale.ordinal()
                        .rangeRoundBands([ padding[0], h - padding[2] ], 0.1);
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            var xAxis = d3.svg.axis()
                        .scale(widthScale)
                        .orient("bottom");
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            var yAxis = d3.svg.axis()
                        .scale(heightScale)
                        .orient("left");
​
​
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            d3.csv("OECD_social.csv", function(data) {
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                data.sort(function(a, b) {
                    return d3.descending(+a.Total, +b.Total);
                });
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​
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                widthScale.domain([ 0, d3.max(data, function(d) {
                    return +d.Total;
                }) ]);
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                heightScale.domain(data.map(function(d) { return d.Country; } ));
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​
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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.Country);
                    })
                    .attr("width", function(d) {
                        return widthScale(d.Total);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", "#d8b365")
                    .append("title")
                    .text(function(d) {
                        return d.Country + "'s social expenditure represents " + d.Total + "% of GDP"
                    })
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                    svg.append("g")
                        .attr("class", "x axis")
                        .attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
                        .call(xAxis);
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                    svg.append("g")
                        .attr("class", "y axis")
                        .attr("transform", "translate(" + padding[3] + ",0)")
                        .call(yAxis);
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                        var line = svg.append("line")
                                .attr("transform", "translate(" + padding[3] + ",0)")
                                .attr("x1", widthScale(21.44))
                                .attr("y1", 32)
                                .attr("x2", widthScale(21.44))
                                .attr("y2", 620)
                                .attr("stroke-width", 0.5)
                                .attr("stroke", "black");
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                    svg.append('text')
                .attr("x", 500)
                                .attr("y", 500)
                .style('text-anchor', 'middle')
                .text("Total OECD");
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                // var line = svg.append("line")
                //      .attr("x1", 440)
                //      .attr("y1", 32)
                //      .attr("x2", 440)
                //      .attr("y2", 620)
                //      .attr("stroke-width", 0.5)
                //      .attr("stroke", "black");
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            });
​
​
        </script>
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    </body>
</html>
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