D3 Examples - Module 4

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Red List Working Bar Chart</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            body {
                background-color: white;
                font-family: Helvetica, Arial, sans-serif;
            }
​
            span.filetype {
                color: grey;
                font-size: 8px;
            
            }
            
            h1 {
                font-size: 20px;
                margin: 0;
            }
​
            p {
                font-size: 12px;
                margin: 10px 0 0 0;
                width: 600px;
            }
​
            svg {
                background-color: white;
            }
​
            rect:hover {
                fill: red;
            }
            
            .axis path,
            .axis line {
                fill: none;
                stroke: grey;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 10px;
            }
​
            .y.axis path,
            .y.axis line {
                opacity: 0;
            }
​
            
​
        </style>
    </head>
    <body>
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        <h1>Threatened Species by Country</h1>
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        <p>IUCN Redlist summary showing number of threatened species (Critically Endangered, Endangered and Vulnerable categories only) in each major group of organisms by country. Source: <a href="https://cmsdocs.s3.amazonaws.com/summarystats/2014_3_Summary_Stats_Page_Documents/2014_3_RL_Stats_Table_5.pdf">IUCN</a><span class="filetype"> [PDF]</span></p>
        <p>Countries are color-coded by continent.</p>
    
    
        <script type="text/javascript">     
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            var w = 500;
            var h = 2000;
            var padding = [ 20, 0, 30, 250 ];  //Top, right, bottom, left
​
            var widthScale = d3.scale.linear()
                                .range([ 0, w - padding[1] - padding[3] ]);
            
            var heightScale = d3.scale.ordinal()
                                .rangeBands([ padding[0], h - padding[2] ], 0.05);
​
            var colorScale = d3.scale.category10();
​
            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("redbook2.csv", function(data) {
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                data.sort(function(a, b) {
                    return d3.descending(+a.Total, +b.Total);
                });
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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; } ));
                
                colorScale.domain(data.map(function(d) { return d.Continent; } ));
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                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.Total);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", function(d) {
                        return colorScale(d.Continent);
                    })
                    .append("title")
                    .text(function(d) {
                        return d.Country + ": " + d.Total;
                    });
​
                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]+5) + ",0)")
                    .call(yAxis);
​
            });
​
​
        </script>
​
    </body>
</html>
    