D3 Examples - TP3 Data viz

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { 
      margin-top:30px;
      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: 20, bottom: 30, left: 20},
        width = 960 - margin.left - margin.right,
        height = 300 - margin.top - margin.bottom;
    
  var duration = 1500,
        delay = 500;
​
​
  var parseDate = d3.timeParse("%b %Y");
​
    var x = d3.scaleTime().range([0, width]),
    c = d3.scaleOrdinal(d3.schemeCategory10);
  var  y = d3.scaleLinear().range([height, 0]);
    
    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) {
​
    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 i = 0;
    
        // Parse and caculate some values for each symbols
    symbols.forEach(function(s) {
      var j = 0;
      s.values.forEach(function(d) { 
        d.date = parseDate(d.date); 
        d.price = +d.price; 
        
        if(i == 0){ // pas de petit frere
          d.beforePrice = 0; 
        }else{          
          d.beforePrice = symbols[i-1].values[j].cumuPrice;
        }
        d.cumuPrice = d.beforePrice + d.price;
        j++;
       
      });
      i++;
      
      s.maxPrice = d3.max(s.values, function(d) { return d.price; });
      s.sumPrice = d3.sum(s.values, function(d) { return d.price; });
      s.maxCumuPrice = d3.max(s.values, function(d) { return d.cumuPrice; });
     
    });
             
    
    setTimeout(multiple, duration);
    
    function multiple() {
    var stack = d3.stack();
    
    var area = d3.area()
    .x(function(d) { return x(d.date); })
    .y0(height)
    .y1(function(d) { return y(d.price); });
      
      height = 100 - margin.top - margin.bottom;
      
        x.domain(d3.extent(data, function(d) { return d.date; }));
        
        y = d3.scaleLinear().range([height, 0])
        y.domain([0, d3.max(symbols.map(function(d) { return d.maxPrice; }))])
       // Add an SVG element for each symbol, with the desired dimensions and margin.
    
      
    var svg = d3.select("body").selectAll("svg")
        .data(symbols)
      .enter().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 + ")");
​
    // Add the area path elements. Note: the y-domain is set per element.
    svg.append("path")
        .attr("class", "area")
        .attr("d", function(d) { y.domain([0, d.maxPrice]); return area(d.values); })
            .style("fill", function(d) { return c(d.key); });
    
    // Add the line path elements. Note: the y-domain is set per element.
  svg.append("path")
      .attr("class", "line")
      .attr("d", function(d) { return line(d.values); })
        .style("stroke", function(d) { return c(d.key); });
​
    
    // Add a small label for the symbol name.
    svg.append("text")
         .attr("x", 12)
        .attr("dy", ".31em")
        .style("text-anchor", "end")
            .style("font-size",12)
        .text(function(d) { return d.key; });
    }
​
  });
    
  </script>
</body>
​
    