D3 Examples - DataVizTP3

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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; }
    .line {
      fill: none;
      stroke: black;
      stroke-width: 1.5px;
    }
  </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 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 g = svg.append("g")
                        .attr("transform", "translate(" + margin
              .left + "," + margin
              .top + ")");
  
var stack = d3.stack();
​
var area = d3.area()
    .x(function(d, i) { return x(d.date); })
    .y0(function(d) { return y(d[0]); })
    .y1(function(d) { return y(d[1]); });
    
    var parseDate = d3.timeParse("%b %Y");
    
    var x = d3.scaleTime().range([0, width]),
        y = d3.scaleLinear().range([height, 0]),
        c = d3.scaleOrdinal(d3.schemeCategory10);
​
  var line = d3.line()
    .curve(d3.curveBasis)
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.price); });
   
​
    d3.text("dataset.csv", function(error, raw) {
    if (error) throw error;
  
    var data = d3.csvParse(raw);
  
// Nest stock values by symbol.
    var symbols = d3.nest()
        .key(function(d) { return d.symbol; })
        .entries(data);
​
        // Parse and caculate some values for each symbols
    symbols.forEach(function(s){
      s.values.forEach(function(d){
        d.date = parseDate(d.date);
        d.price = +d.price;
      });
      
      s.maxPrice = d3.max(s.values, function(d) { return d.price; });
      s.sumPrice = d3.sum(s.values, function(d) { return d.price; });
      
      console.log(symbols);
    });
​
  x.domain(d3.extent(data, function(d) { return d.date; }));
    y.domain([0, d3.max(symbols.map(function(d) { return d.maxPrice; }))])
  
 
  // dessiner les stacks area chart
  stack.keys(["MSFT", "AMZN", "IBM", "AAPL"]);
​
  var layer = svg.selectAll(".layer")
    .data(stack(symbols))
    .enter().append("g")
    .attr("class", "layer");
​
  layer.append("path")
      .attr("class", "area")
      .style("fill", function(d) { return c(d.key); })
      .attr("d", area );
 
  layer.filter(function(d) { return d[d.length - 1][1] - d[d.length - 1][0] > 0.01; })
    .append("text")
      .attr("x", width - 6)
      .attr("y", function(d) { return y((d[d.length - 1][0] + d[d.length - 1][1]) / 2); })
      .attr("dy", ".35em")
      .style("font", "10px sans-serif")
      .style("text-anchor", "end")
      .text(function(d) { return d.key; });
 
    
    // dessiner les axes
    svg.append("g")
        .attr("class", "axis axis--x")
        .attr("transform", "translate(0," + height + ")")
        .call(d3.axisBottom(x));
​
    svg.append("g")
        .attr("class", "axis axis--y")
        .call(d3.axisLeft(y).ticks(20));
       
    
    // dessiner la legende
   var legend = svg.selectAll(".legend")
    .data(c.domain())
    .enter().append("g")
    .attr("class", "legend")
    .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")";});
    
    legend.append("rect")
      .attr("x", 30)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", c);
​
    legend.append("text")
      .attr("x", 50)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "start")
      .text(function(d) { return d; });
  });
    
​
  </script>
</body>
​
    