D3 Examples

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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 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]),
    color = d3.scaleOrdinal(d3.schemeCategory10);
​
var m = [20, 20, 30, 20],
    w = 960 - m[1] - m[3],
    h = 500 - m[0] - m[2];
​
var x,
    y,
    duration = 1500,
    delay = 500;
​
var stocks,
    symbols;
​
// A line generator, for the dark stroke.
var line = d3.line()
        .curve(d3.curveBasis)
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.price); });
​
// A line generator, for the dark stroke.
var axis = d3.line()
    .curve(d3.curveBasis)
        .x(function(d) { return x(d.date); })
    .y(h);
​
// A area generator, for the dark stroke.
var area = d3.area()
        .curve(d3.curveBasis)
    .x(function(d) { return x(d.date); })
    .y1(function(d) { return y(d.price); });
​
​
    d3.csv("dataset.csv", function(data) {
​
  // Nest stock values by symbol.
  symbols = d3.nest()
      .key(function(d) { return d.symbol; })
      .entries(stocks = data);
​
  // Parse dates and numbers. We assume values are sorted by date.
  // Also compute the maximum price per symbol, needed for the y-domain.
  symbols.forEach(function(s) {
    s.values.forEach(function(d) { d.date = parseDate(d.date);(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; });
  });
​
  // Sort by maximum price, descending.
  symbols.sort(function(a, b) { return b.maxPrice - a.maxPrice; });
    
       var g = svg.selectAll("g")
      .data(symbols)
        .enter().append("g")
      .attr("class", "symbol")
      
      areas();
});
​
​
    
function areas() {
  var g = svg.selectAll(".symbol");
​
  axis
      .y(h / 4 - 21);
​
  g.selectAll(".line")
      .attr("d", function(d) { return axis(d.values); });
​
  g.each(function(d) {
    y.domain([0, d.maxPrice]);
​
    d3.select(this).select(".line").transition()
        .duration(duration)
        .style("stroke-opacity", 1)
        .each("end", function() { d3.select(this).style("stroke-opacity", null); });
​
    d3.select(this).selectAll(".area")
        .filter(function(d, i) { return i; })
      .transition()
        .duration(duration)
        .style("fill-opacity", 1e-6)
        .attr("d", area(d.values))
        .remove();
​
    d3.select(this).selectAll(".area")
        .filter(function(d, i) { return !i; })
      .transition()
        .duration(duration)
        .style("fill", color(d.key))
        .attr("d", area(d.values));
  });
​
  svg.select("defs").transition()
      .duration(duration)
      .remove();
​
​
  setTimeout(areas, duration + delay);
}
​
    
  </script>
</body>
​
    