D3 Examples - USA 2010 Population by State

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>USA 2010 Population by State - bar chart</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
        <style type="text/css">
            
            body {
                background-color: #ddddff;
            }
​
            svg {
                background-color: white;
            }
​
            .chart rect {
            fill: steelblue;
            }
            
        </style>
    </head>
    <body>
        
        <script type="text/javascript">     
​
            var svgWidth = 400;
            var svgHeight = 600;
​
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", svgWidth)
                        .attr("height", svgHeight)
                        .attr("class","chart");
​
            var thousandsFormat = d3.format("0,000");
            
            d3.csv("usa_2010_population_by_state.csv", function(data) {
                
                var totalPopulation = d3.sum(data, function(d) { return +d.census2010Population; });
                // use max population to calculate the width of the bars
                var maxPopulation = d3.max(data, function(d) { return +d.census2010Population; });
                
                console.log("totalPopulation: " + totalPopulation);
                console.log("maxPopulation: " + maxPopulation);
                console.log("# of rows: " + data.length);
​
                data.sort(function(a, b) {
                    return d3.descending(+a.census2010Population, +b.census2010Population);
                });
​
                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
​
                rects.attr("x", 0)
                    .attr("y", function(d, i) {
                        return i * svgHeight / data.length;
                    })
                    .attr("width", function(d) {
                        return d.census2010Population / maxPopulation * svgWidth;
                    })
                    .attr("height", svgHeight / data.length * .8)
                    .append("title")
                    .text(function(d, i) {
                        return i + 1 + ") " + d.state + ": " + thousandsFormat(d.census2010Population);
                    });
​
            });
​
​
        </script>
​
    </body>
</html>
    