Area Chart

This simple area chart is constructed from a TSV file storing the closing value of AAPL stock over the last few years. The chart employs conventional margins and a number of D3 features:

d3.tsv - load and parse data
d3.time.format - parse dates
d3.time.scale - x-position encoding
d3.scale.linear - y-position encoding
d3.extent and d3.max - compute domains
d3.svg.axis - display axes
d3.svg.area - display area shape

forked from mbostock's block: Area Chart

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
  
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.area {
  fill: #D0D3D4;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var parseDate = d3.time.format("%d-%b-%y").parse;

var x = d3.time.scale()
    .range([0, width]);

var y = d3.scale.linear()
    .range([height, 0]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left");

var area = d3.svg.area()
    .x(function(d) { return x(d.date); })
    .y0(height)
    .y1(function(d) { return y(d.close); });

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 + ")");

d3.tsv("data.tsv", function(error, data) {
  if (error) throw error;

data.forEach(function(d) {
    d.date = parseDate(d.date);
    d.close = +d.close;
  });

x.domain(d3.extent(data, function(d) { return d.date; }));
  y.domain([0, d3.max(data, function(d) { return d.close; })]);

svg.append("path")
      .datum(data)
      .attr("class", "area")
      .attr("d", area);

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Price ($)");
  
//   var focus = svg.append("g")
//       .attr("class", "focus")
//       .style("display", "none");

//   focus.append("circle")
//       .attr("r", 4.5);

//   focus.append("text")
//       .attr("x", 9)
//       .attr("dy", ".35em");

//   svg.append("rect")
//       .attr("class", "overlay")
//       .attr("width", width)
//       .attr("height", height)
//       .on("mouseover", function() { focus.style("display", null); })
//       .on("mouseout", function() { focus.style("display", "none"); })
//       .on("mousemove", mousemove);

//   function mousemove() {
//     var x0 = x.invert(d3.mouse(this)[0]),
//         i = bisectDate(data, x0, 1),
//         d0 = data[i - 1],
//         d1 = data[i],
//         d = x0 - d0.date > d1.date - x0 ? d1 : d0;
//     focus.attr("transform", "translate(" + x(d.date) + "," + y(d.close) + ")");
//     focus.select("text").text(formatCurrency(d.close));
//   }
  
  
});

</script>

https://d3js.org/d3.v3.min.js