D3 Examples - knight d3 week 3

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Test</title>
        <script src="https://d3js.org/d3.v3.min.js"></script>
        <style type="text/css">
        
        body {
            background-color: #ddddff;
        }
​
        svg {
            background-color: white;
        }
        
        .bar {
            height : 8;
        }
        
        .text {
            color: black;
            font-size: 26px;
        }
​
        </style>
    </head>
    <body>
              
        <script>
        var width = 1200,
            height = 5000
            
        var svg = d3.select("body").append("svg")
            .attr("width", width)
            .attr("height", height);
            
        d3.csv("tweeps.csv", function(data) {
        
       
            var max_followers_count = d3.max(data, function(d) { return parseInt(d.followers_count); });
            var max_friends_count = d3.max(data, function(d) { return parseInt(d.friends_count); });
            
            data.sort(function(a, b) {
                return d3.descending(+a.followers_count, +b.followers_count); // + signs because it makes ints from strrings
                });
                        
            console.log(max_followers_count);
            console.log(max_friends_count);
​
            var tweeps = svg.selectAll("g")
                            .data(data)
                            .enter()
                            .append("g")                            
                            .attr("class", "tweep")
                            .attr("id", function(d) { return d.id; })
                            
            
            followers = tweeps.append("rect")                            
                                .attr("class", "followers bar")
                                .attr("id", function(d) { return d.id + "_followers"; })
                                .attr("fill", "blue")
                                .attr("x", 0)
                                .attr("y", function(d, i) { return i * 10; })
                                .attr("width", function(d) { return d.followers_count/(max_followers_count+max_friends_count) * width; })
                                .attr("height", 8)
                                .append("title")
                                .text(function(d) { return d.name + " has " + d.followers_count + " followers"} );
            
            friends = tweeps.append("rect")                            
                                .attr("class", "friends bar")
                                .attr("id", function(d) { return d.id + "_followers"; })
                                .attr("fill", "red")
                                .attr("x", function(d) { return d.followers_count/(max_followers_count+max_friends_count) * width; })
                                .attr("y", function(d, i) { return i * 10; })
                                .attr("width", function(d) { return d.friends_count/(max_followers_count+max_friends_count) * width; })
                                .attr("height", 8)
                                .append("title")
                                .text(function(d) { return d.name + " has " + d.friends_count + " friends"} );
                              
​
                                
            });
        
        
        
        </script>
    </body>
</html>
    