Line Chart with Bounds

This simple line 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-dsv - parse tab-separated values
d3-time-format - date parsing and formatting
d3-scale - position encodings
d3-array - data processing
d3-axis - axes
d3-shape - lines

forked from mbostock's block: Line Chart

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

.axis--x path {
  display: none;
}
  
.axis--y path {
  display: none;
}

.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 3px;
}
  
.area {
  fill: steelblue;
  stroke: steelblue;
  stroke-width: 3px;
  opacity: .2
}

</style>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var svg = d3.select("svg"),
    margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom,
    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var parseTime = d3.timeParse("%d-%b-%y");

var x = d3.scaleTime()
    .rangeRound([0, width]);

var y = d3.scaleLinear()
    .rangeRound([height, 0]);

d3.tsv("data.tsv", function(d) {
  d.date = parseTime(d.date);
  d.close = +d.close;
  return d;
}, function(error, data) {
  if (error) throw error;

data = data.map(function(d){
    d.upper = Math.random()*100 + d.close;
    d.lower = Math.max(0,-Math.random()*100 + d.close);
    return d
  })
  
  
  var extentDate = d3.extent(data, function(d) { return d.date; })
 var releaseDate = new Date(2012,10,0);
  extentDate[1] = releaseDate;
  x.domain(extentDate);
  y.domain(d3.extent(data, function(d) { return d.close; }));

g.append("g")
      .attr("class", "axis axis--x")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x).tickFormat(d3.timeFormat('%b %Y')));

g.append("g")
      .attr("class", "axis axis--y")
      .call(d3.axisLeft(y))
    .append("text")
      .attr("fill", "#000")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", "0.71em")
      .style("text-anchor", "end")
      .text("Gross ($)");

g.append("path")
      .datum(data)
      .attr("class", "line")
      .attr("d", line);

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

g.append("line")
      .attr("x1", x(releaseDate))
      .attr("y1", height)
      .attr("x2", x(releaseDate))
      .attr("y2", height * 0.2)
      .attr("stroke-width", 2)
      .attr("stroke", "lightgray");

var color = "gray";
var triangleSize = 30;

var triangle = d3.symbol()
            .type(d3.symbolTriangle)
            .size(triangleSize)
;

g.append("path")
            .attr("d", triangle)
            .attr("stroke", color)
            .attr("fill", color)
            .attr("transform", function(d) { return "translate(" +  x(releaseDate) + "," +  height * 0.187 + ")  rotate(180)"; });

g.append("text")
						.text('Release Date')
            .attr("transform", function(d) { return "translate(" +  x(new Date(2012,4,0)) + "," +  height * 0.15 + ")"; });

g.append("text")
						.text('Feb. 11')
            .attr("transform", function(d) { return "translate(" +  x(new Date(2012,4,0)) + "," +  height * 0.19 + ")"; });
  
});

</script>

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