D3 Examples - The Trees in Champaign by Diameter

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Trees in Champaign</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
        <style type="text/css">
            
            body {
                background-color:rgba(89,173,120,1.00);
            }
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            svg {
                background-color:rgba(185,228,246,1.00);
                margin:20px;
            }
             rect { 
             
                fill: #75523A;
             }
​
        </style>
    </head>
    <body>
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        <script type="text/javascript">     
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​
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", 1200)
                        .attr("height", 1500);
​
​
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            d3.csv("Champaign-trees-diam-totals.csv", function(data) {
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                data.sort(function(a, b) {
                    return d3.descending(+a.avgDiameter, +b.avgDiameter);
​
                    //If your numeric values aren't sorting properly,
                    //try commenting out the line above, and instead using:
                    //
                    //return d3.descending(+a.lifeSatisfaction, +b.lifeSatisfaction);
                    //
                    //Data coming in from the CSV is saved as strings (text),
                    //so the + signs here force JavaScript to treat those
                    //strings instead as numeric values, thereby fixing the
                    //sort order (hopefully!).
                });
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                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
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                rects.attr("x", 0)
                    .attr("y", function(d, i) {
                        return i * 10;
                    })
                    .attr("width", function(d) {
                        return Math.round((+d.avgDiameter) * 30);
                    })
                    .attr("height", 8)
                    .append("title")
                    .text(function(d) {
                        return "Champaign's " + d.totalSpecimens + " " + d.commonName + " trees have an average diameter of " + Math.round((+d.avgDiameter)) + " feet.";
                    });
​
            });
​
​
        </script>
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    </body>
</html>
    