D3 Examples - TP3_dataviz

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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; 
    }
    
    svg {
      font: 10px sans-serif;
    }
    .line {
      fill: none;
      stroke: black;
      stroke-width: 2px;
    }
  </style>
</head>
​
<body>
  <script>
  var margin = {top: 20, right: 30, bottom: 20, left: 100},
      width = 760 - margin.left - margin.right,
      height = 300 - margin.top - margin.bottom;
  var c = d3.scaleOrdinal(d3.schemeCategory10);
    
  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 + ")");
​
  var parseDate = d3.timeParse("%b %Y");
​
  d3.text('dataset.csv', function(error, raw) {
​
    var dsv = d3.dsvFormat(',')
    var data = dsv.parse(raw);
    
    // Nest stock values by symbol.
    var symbols = d3.nest()
        .key(function(d) { return d.symbol; })
        .entries(data);
​
    var numberOfSymbols = symbols.length, // number of layers
        m = symbols[0].values.length; // number of samples per layer
​
    var stack = d3.stack().keys(d3.range(numberOfSymbols)).offset(d3.stackOffsetWiggle),
        layers = stack(d3.transpose(d3.range(numberOfSymbols).map(function(indice) { return bumps(symbols,indice); })));
    var x = d3.scaleLinear()
        .domain([0, m - 1])
        .range([0, width]);
​
    
    var y = d3.scaleLinear()
        .domain([d3.min(layers, stackMin), d3.max(layers, stackMax)])
        .range([height, 0]);
​
    var z = d3.interpolateCool;
​
    var area = d3.area()
        .x(function(d, i) { return x(i); })
        .y0(function(d) { return y(d[0]); })
        .y1(function(d) { return y(d[1]); });
​
    svg.selectAll("path")
      .data(layers)
      .enter().append("path")
        .attr("d", area)
        .attr("fill", function(d) { return c(d.key) });
    
  });
    
  function stackMax(layer) {
    return d3.max(layer, function(d) { return d[1]; });
  }
​
  function stackMin(layer) {
    return d3.min(layer, function(d) { return d[0]; });
  }
​
  function bumps(symbols, indice) {
    var map = [];
    var nbValues = symbols[0].values.length;
    for(var i = 0; i < nbValues; ++i){
      map[i] = parseInt(symbols[indice].values[i].price);
    }
    return map;
  }     
  </script>
</body>
​
    