TP3_dataviz_Stacked

<!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 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");

var x = d3.scaleTime().range([0, width]),
    	y = d3.scaleLinear().range([height, 0]),
    	c = d3.scaleOrdinal(d3.schemeCategory10);

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);

// Parse and caculate some values for each symbols
    var i = 0;
    var sumMaxPrice = 0;
    symbols.forEach(function(s) {
      s.values.forEach(function(d) { 
        d.date = parseDate(d.date); 
        d.price = +d.price; 
      });
      
      // Pour faire pointer un element sur le suivant
      var j = 0;
      s.values.forEach(function(v){
        if(i == 0){ // pas de petit frere
          v.beforePrice = 0; 
        }else{          
          v.beforePrice = symbols[i-1].values[j].somePrice;
        }
        v.somePrice = v.beforePrice + v.price;
        j++;
      });
      i++;
      
      s.maxPrice = d3.max(s.values, function(d) { return d.somePrice; });
      s.sumPrice = d3.sum(s.values, function(d) { return d.price; });
      s.lastPrice = s.values[s.values.length - 1].somePrice;
      console.log(s.lastPrice);
      s.someLastPrice = s.values[s.values.length - 1].somePrice;
    });

x.domain(d3.extent(data, function(d) { return d.date; }));

y.domain([0, d3.max(symbols.map(function(d) { return d.maxPrice; }))])

svg.selectAll(".line").data(symbols).enter()
      .append("path")
      .attr("fill", function(d) { return c(d.key); })
      .attr("d", function(d) { return area(d.values); })
      .style("fill-opacity", 0.5)// Opacity du remplissage
      .style("stroke", "black" )
    	.style("stroke-opacity", 1); // Opacity du trait;

svg.selectAll()
         .data(symbols)
         .enter().append("text")
          .attr("x", width + 30)
          .attr("y", function(d) { return height - d.lastPrice/2 })
          .style("text-anchor", "end")
          .text(function(d) { return d.key });     
  });
    
  </script>
  
</body>

https://d3js.org/d3.v4.min.js