D3 Examples - Alpha Frequency

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>
​
<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var margin = {
        top: 20,
        right: 20,
        bottom: 30,
        left: 40
      };
​
    var width = 960 - margin.left - margin.right;
    var height = 500 - margin.top - margin.bottom;
​
    var svg = d3.select("body").append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
      .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
    
    // Scale 
    var x = d3.scaleLinear()
    .range([0, width]);
​
    var y = d3.scaleBand()
    .range([0, height]);
    
    // Axes
    var xAxis = d3.axisTop(x)
        .ticks(10, "%");
​
    var yAxis = d3.axisLeft(y);
    
    d3.csv("alpha_frequencies.csv", function(error, data){
        if (error) throw error;
      
      data.forEach(function(d) {
        return d.frequency = +d.frequency;
      });
      
      data.sort(function(a, b) {
        return b.frequency - a.frequency
      })
​
      x.domain([0, d3.max(data, function(d) { return d.frequency; })]);
​
      y.domain(data.map(function(d) { return d.letter; }))
        .paddingInner(0.1);
      
      console.log(data);
​
      svg.append("g")
          .attr("class", "y axis")
          .attr("transform", "translate(-3, 0)")
          .call(yAxis);
​
      svg.append("g")
          .attr("class", "x axis")
          .attr("transform", "translate(0,-3)")
          .call(xAxis);
      
      svg.selectAll(".bar")
        .data(data)
        .enter().append("rect")
        .attr("class", "bar")
        .attr("x", 0)
        .attr("height", y.bandwidth())
        .attr("y", function(d) { return y(d.letter); })
        .attr("width", function(d) { return x(d.frequency); })
        .style("fill", "steelblue")
      
    });
  </script>
</body>
​
    