D3 Examples - Module 4 exercise - Global refugee data chart

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Global refugee data</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            body {
                background-color: white;
                font-family: Book Antiqua;
                font-weight: bold;
                margin-left: 50px;
            }
            h1 {
                font-family: Book Antiqua;
                font-size: 24px;
                margin: 0;
                color: #323232;
            }
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            p {
                font-family: Book Antiqua;
                font-size: 14px;
                color: #323232;
                margin: 10px 0 0 0;
            }
            svg {
                background-color: #323232;
            }
            rect:hover {
                fill: #ff9900;
            }
            .axis path,
            .axis line {
                fill:none;
                stroke: white;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: Book Antiqua;
                fill: white;
                font-size: 10px;
            }
            
            .y.axis path,
            .y.axis line {
                opacity:0;
            }
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        </style>
    </head>
    <body>
<h1>Global Refugee Data Chart</h1>
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        <p>Average annual refugees (2009-2013) per GDP at PPP 2013 for selected countries. Source: <a href="https://popstats.unhcr.org/#_ga=1.152203577.1033056182.1429126874">UNHCR</a> and <a href="https://data.worldbank.org/indicator/NY.GDP.PCAP.PP.CD">World Bank</a></p><br/>
        <script type="text/javascript">
            var w=900;
            var h=750;
            var padding = [ 20, 10, 30, 175 ];  //Top, right, bottom, left
            
            var wScale = d3.scale.linear()
                                    .range ([0, w-padding[1]-padding[3]]);
            
            var hScale=d3.scale.ordinal()
                                .rangeRoundBands([padding[0], h-padding[2]], 0.1);
                                                  
            var xAxis = d3.svg.axis()
                              .scale(wScale)
                              .orient("bottom");
                                                  
            var yAxis = d3.svg.axis()
                              .scale(hScale)
                              .orient("left");                                      
                                                  
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
​
            d3.csv("RefugeeData.csv", function(data) {
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                data.sort(function(a, b) {
                    return d3.descending(+a.ref_p_gdp, +b.ref_p_gdp);
                });
                                                  
                wScale.domain([0,d3.max(data, function(d) {
                    if (d.ref_p_gdp>10){
                        return +d.ref_p_gdp;
                    }
                }) ]);
            
                hScale.domain(data.map(function(d) {
                    if (d.ref_p_gdp>10){
                        return d.country;}
                }));
​
                var rects = svg.selectAll("rect").data(data).enter().append("rect");
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                rects.attr("x", padding[3])
                    .attr("y", function(d) {
                    if (d.ref_p_gdp>10){
                       return hScale(d.country);
                    }
                    })
                    .attr("width", function(d) {
                    if (d.ref_p_gdp>10){
                       return wScale(d.ref_p_gdp);
                    }
                    })
                    .attr("height", hScale.rangeBand())
                    .attr("fill","#ffc04c");
                      
                      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>
    