bgschiller/index.html

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

body {
  font: 10px sans-serif;
}

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

.x.axis path {
  display: none;
}

.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 1.5px;
}

svg text {
  font-size:24px;
}

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

var margin = {top: 40, right: 150, bottom: 50, left: 100},
    width = window.innerWidth - margin.left - margin.right,
    height = window.innerHeight - margin.top - margin.bottom;

var parseDate = d3.time.format("%Y%m%d").parse;

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

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

var color = d3.scale.category10();

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

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

var line = d3.svg.line()
    .interpolate("basis")
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.dollars); });

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 today = new Date(),
    start = new Date(),
    formatDate = d3.time.format("%Y-%m-%d");
start.setFullYear(today.getFullYear() - 2);

d3.json(("http://www.quandl.com/api/v1/datasets/BCB/UDJIAD1.json?trim_start=" + formatDate(start) + "&trim_end=" + formatDate(today)), function(error, data) {
  data = data.data.map(function(d) {
    return {
      date: formatDate.parse(d[0]),
      DOW: d[1]
    };
  }).reverse();

  var moving_sum = 0,
      MA_length = 21;
  for(var ix=0; ix < data.length; ix++){
    moving_sum += data[ix].DOW;
    if (ix - MA_length >= 0){
      moving_sum -= data[ix - MA_length].DOW;
    }
    var divisor = Math.min(ix + 1, MA_length);

    data[ix][MA_length + '- Day Avg'] = moving_sum / divisor;
    data[ix]['Avg + 3.5%'] = (moving_sum / divisor) * (1 + 0.035);
    data[ix]['Avg - 3.5%'] = (moving_sum / divisor) * (1 - 0.035);
  }


  color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; }));

  var series = color.domain().map(function(name) {
    return {
      name: name,
      values: data.map(function(d) {
        return {date: d.date, dollars: +d[name]};
      })
    };
  });

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

  y.domain([
    d3.min(series, function(c) { return d3.min(c.values, function(v) { return v.dollars; }); }),
    d3.max(series, function(c) { return d3.max(c.values, function(v) { return v.dollars; }); })
  ]);

  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("dollars");

  var city = svg.selectAll(".city")
      .data(series)
    .enter().append("g")
      .attr("class", "city");

  city.append("path")
      .attr("class", "line")
      .attr("d", function(d) { return line(d.values); })
      .style("stroke", function(d) { return color(d.name); });

  city.append("text")
      .datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; })
      .attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.dollars) + ")"; })
      .attr("x", 3)
      .attr("dy", ".35em")
      .text(function(d) { return d.name; });
});

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

	body {
	font: 10px sans-serif;
	}

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

	.x.axis path {
	display: none;
	}

	.line {
	fill: none;
	stroke: steelblue;
	stroke-width: 1.5px;
	}

	svg text {
	font-size:24px;
	}

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

	var margin = {top: 40, right: 150, bottom: 50, left: 100},
	width = window.innerWidth - margin.left - margin.right,
	height = window.innerHeight - margin.top - margin.bottom;

	var parseDate = d3.time.format("%Y%m%d").parse;

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

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

	var color = d3.scale.category10();

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

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

	var line = d3.svg.line()
	.interpolate("basis")
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y(d.dollars); });

	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 today = new Date(),
	start = new Date(),
	formatDate = d3.time.format("%Y-%m-%d");
	start.setFullYear(today.getFullYear() - 2);

	d3.json(("http://www.quandl.com/api/v1/datasets/BCB/UDJIAD1.json?trim_start=" + formatDate(start) + "&trim_end=" + formatDate(today)), function(error, data) {
	data = data.data.map(function(d) {
	return {
	date: formatDate.parse(d[0]),
	DOW: d[1]
	};
	}).reverse();

	var moving_sum = 0,
	MA_length = 21;
	for(var ix=0; ix < data.length; ix++){
	moving_sum += data[ix].DOW;
	if (ix - MA_length >= 0){
	moving_sum -= data[ix - MA_length].DOW;
	}
	var divisor = Math.min(ix + 1, MA_length);

	data[ix][MA_length + '- Day Avg'] = moving_sum / divisor;
	data[ix]['Avg + 3.5%'] = (moving_sum / divisor) * (1 + 0.035);
	data[ix]['Avg - 3.5%'] = (moving_sum / divisor) * (1 - 0.035);
	}



	color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; }));

	var series = color.domain().map(function(name) {
	return {
	name: name,
	values: data.map(function(d) {
	return {date: d.date, dollars: +d[name]};
	})
	};
	});

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

	y.domain([
	d3.min(series, function(c) { return d3.min(c.values, function(v) { return v.dollars; }); }),
	d3.max(series, function(c) { return d3.max(c.values, function(v) { return v.dollars; }); })
	]);

	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("dollars");

	var city = svg.selectAll(".city")
	.data(series)
	.enter().append("g")
	.attr("class", "city");

	city.append("path")
	.attr("class", "line")
	.attr("d", function(d) { return line(d.values); })
	.style("stroke", function(d) { return color(d.name); });

	city.append("text")
	.datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; })
	.attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.dollars) + ")"; })
	.attr("x", 3)
	.attr("dy", ".35em")
	.text(function(d) { return d.name; });
	});

	</script>