tgk/data.tsv

## readme.md

      
    Raw
  

              readme.md
            
          
    Adapted example from Line Chart and Animated Line Graphs / Sparklines using SVG Path and d3.js. The objective is to examine what happens when new data points can arrive at any position of the graph.

  
## data.tsv

          
            date
            close

            
              1-May-12
              0.114

            
              27-Apr-12
              0.12

## data2.tsv

          
            date
            close

            
              1-May-12
              0.114

            
              30-Apr-12
              0.112

            
              27-Apr-12
              0.12

## 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;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.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 line = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(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 + ")");

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("Rate");

var first = true;

var update = function(error, data) {
  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(d3.extent(data, function(d) { return d.close; }));

  svg.select(".x.axis")
      .transition()
      .call(xAxis);

  svg.select(".y.axis")
      .transition()
      .call(yAxis);

  if (first) {
    svg.append("svg:path")
      .datum(data)
      .attr("class", "line")
      .attr("d", line);
    first = false;
  }
  else {
    svg.selectAll(".line")
      .datum(data)
      .transition()
      .ease("linear")
      .attr("d", line);
  }
};

d3.tsv("data.tsv", update);
setTimeout(function() { d3.tsv("data2.tsv", update)}, 3000);

</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;
	}

	</style>
	<body>
	<script src="http://d3js.org/d3.v3.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 line = d3.svg.line()
	.x(function(d) { return x(d.date); })
	.y(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 + ")");

	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("Rate");

	var first = true;

	var update = function(error, data) {
	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(d3.extent(data, function(d) { return d.close; }));

	svg.select(".x.axis")
	.transition()
	.call(xAxis);

	svg.select(".y.axis")
	.transition()
	.call(yAxis);

	if (first) {
	svg.append("svg:path")
	.datum(data)
	.attr("class", "line")
	.attr("d", line);
	first = false;
	}
	else {
	svg.selectAll(".line")
	.datum(data)
	.transition()
	.ease("linear")
	.attr("d", line);
	}
	};

	d3.tsv("data.tsv", update);
	setTimeout(function() { d3.tsv("data2.tsv", update)}, 3000);

	</script>