D3 Examples - Lecture 3 HW

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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>
​
        var data=d3.csv('stocks.csv',function(error, data){
      var dataset=data;
    data.forEach(function(d){
        d.price = +d.price;
        d.date = d.date.substring(d.date.length - 4);
      })
        
    function sommeAnneeSymbol(year,symbol){
      var somme = 0;
      data.forEach(function(d){
        if (d.date==year && d.symbol==symbol){
          somme += d.price
        }
      })
        return somme
    }
      
    function sommeAnnee(year){
      var somme = 0;
      data.forEach(function(d){
        if (d.date==year){
          somme += d.price
        }
      })
        return somme
    }
   
      
    var color = d3.scaleOrdinal(d3.schemeCategory20);
      
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);
​
    var x0 = d3.scaleBand()
        .range([0, d3.select("svg").attr("width")])
            .domain(d3.map(data,function(d){ return d.date; }).keys()); 
    
    var y0 = d3.scaleLinear()
        .domain([0, d3.max(data, function(d){return sommeAnnee(d.date)})])
        .range([0, +d3.select("svg").attr("height")]);
    
    var z0 = d3.scaleBand()
        .range([0,x0.bandwidth()])
            .domain(d3.map(data,function(d){ return d.symbol; }).keys()); 
    
        var s = svg.selectAll("rect").data(data);
    
      
    s.enter()
     .append("rect")
     .attr("class", "vertical")
    
    s.enter()
     .append("rect")
     .attr("class", "horizontal")
    
    
    svg.selectAll("rect")
        .attr("class", "bar")
        .attr("width", function(d, i) {return x0.bandwidth()/4; })
      .attr("height", function(d, i) { return y0(sommeAnneeSymbol(d.date,d.symbol)); })
      .attr("x", function(d, i) {return x0(d.date)+z0(d.symbol); })
      .attr("y",  function(d) { return 400 - y0(sommeAnneeSymbol(d.date,d.symbol)); })
        .style("fill", function(d){return color(d.symbol)})
        .style('opacity',100)
      
    })
​
  </script>
</body>
​
    