DataViz_TP3_stacked

forked from romsson's block: loading multiple stock data from dataset

forked from alicemontel's block: DataViz_TP3_areas

<!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 g = svg.append("g");

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
    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; }))])
    
    var texts=svg.selectAll(".symbols").data(symbols).enter().append("text");
    texts
     	.attr("x", x(x.domain()[1])+5)
     	.attr("dy", ".35em")
     	.style("text-anchor", "start")
     	.text(function(d) { return d.key; })
    	.attr("y", function(d) {return y(d.maxPrice);});
    
    var stack = d3.stack();
      
    stackedareas();
    
    function stackedareas(){
      var keys = data.columns.slice(1);

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

var layer = g.selectAll(".layer")
        .data(stack(data))
        .enter().append("g")
          .attr("class", "layer");

layer.append("path")
        .attr("class","area")
      	.attr("d", function(d) { return area(d.values); })
        .attr("fill", function(d) { return c(d.key); })
      	.attr("opacity", 0.5);

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; });
        }

// draw axis
          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));*/

});
    
  </script>
</body>

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