D3 Examples - Income per capita by country

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Income Per Capita - by country</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            body {
                background-color: #FFF;
                font-family: HelveticaNeue;
            }
​
            h1 {
                font-size: 24px;
                color: #0D5047;
                margin: 0;
            }
​
            svg {
                background-color: #FFF;
            }
​
            rect:hover {
                fill: #0D5047;
            }
​
            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
            }
​
            .axis text {
                font-size: 9px;
            }
​
            .y.axis path,
            .y.axis line {
                opacity: 0;
            }
​
        </style>
    </head>
    <body>
        <h1>Income per Capita by country</h1>
​
        <script type="text/javascript">     
​
            var w = 700;
            var h = 1500;
            var padding = [0,30,50,120];
​
            var widthScale = d3.scale.linear()
                                .range([0, w - padding[1] - padding[3]
                                ]);
​
            var heightScale = d3.scale.ordinal()
                                .rangeRoundBands([padding[0], h-padding[2] ], 0.1);
​
            var xAxis = d3.svg.axis()
                            .scale(widthScale)
                            .orient("bottom");
​
            var yAxis = d3.svg.axis()
                            .scale(heightScale)
                            .orient("left");
​
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
​
​
​
            d3.csv("WHO_data.csv", function(data) {
​
                data.sort(function(a, b) {
                    return d3.descending(+a.incomePerCapita, +b.incomePerCapita);
                });
​
                widthScale.domain([0, d3.max(data, function(d) {
                    return +d.incomePerCapita;
                }) ]);
​
                heightScale.domain(data.map(function(d) {
                    return d.country;
                } ));
​
                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
​
                rects.attr("x", padding[3])
                    .attr("y", function(d) {
                        return heightScale(d.country);
                    })
                    .attr("width", function(d) {
                        return widthScale(d.incomePerCapita);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", "#6BA099")
                    .append("title")
                    .text(function(d) {
                        return d.country + "'s income per capita is " + d.incomePerCapita;
                    });
​
                svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(" + padding[3] + "," + (h-padding[2]) + ")")
                    .call(xAxis);
​
                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + padding[3] + ",0)")
                    .call(yAxis);
​
            });
​
​
        </script>
​
    </body>
</html>
    