vwochnik/.block

## .block
license: mit

## draw.js
var margin = {top: 20, right: 100, bottom: 30, left: 100},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var dataset = [
  {x: 0, y: 15},
  {x: 2, y: 3},
  {x: 4, y: 35},
  {x: 6, y: 2},
  {x: 8, y: 38},
  {x: 10, y: 40}
];

var xScale = d3.scale.linear()
  .domain([0, d3.max(dataset, function(d){ return d.x; })])
  .range([0, width]);

var yScale = d3.scale.linear()
  .domain([0, d3.max(dataset, function(d){ return d.y; })])
  .range([height, 0]);

var xAxis = d3.svg.axis()
  .scale(xScale)
  .orient("bottom")
  .innerTickSize(-height)
  .outerTickSize(0)
  .tickPadding(10);

var yAxis = d3.svg.axis()
  .scale(yScale)
  .orient("left")
  .innerTickSize(-width)
  .outerTickSize(0)
  .tickPadding(10);

var line = d3.svg.line()
  .x(function(d) { return xScale(d.x); })
  .y(function(d) { return yScale(d.y); })
  .interpolate(function(pts) {
    var res = ""+pts[0];
    for (var i = 0; i < pts.length - 1; i++) {
      var s = 1 / (pts[i+1][0] - pts[i][0]) / 5;
      for (var t = s; t <= 1.0; t += s) {
        var r = Math.max(0, Math.min(1, Math.abs((pts[i+1][1] - pts[i][1]) / (pts[i+1][0] - pts[i][0])))),
            c = t*(1-r) + (1 - Math.cos(t*Math.PI)) / 2 * r;

        res += "L" + [(1-t)*pts[i][0]+t*pts[i+1][0], pts[i][1]*(1-c) + pts[i+1][1]*c];
      }
    }

    return res;
  });

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)

svg.append("path")
  .data([dataset])
  .attr("class", "line")
  .attr("d", line);

## index.html
<!doctype html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<title>Line Chart</title>
<style>
  .axis path,
  .axis line{
    fill: none;
    stroke: black;
  }

  .line{
    fill: none;
    stroke: blue;
    stroke-width: 2px;
  }

  .tick text{
    font-size: 12px;
  }

  .tick line{
    opacity: 0.2;
  }
</style>
</head>
<body>
<script src="http://d3js.org/d3.v3.js"></script>
<script src="draw.js"></script>
</body>
</html>
	var margin = {top: 20, right: 100, bottom: 30, left: 100},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	var dataset = [
	{x: 0, y: 15},
	{x: 2, y: 3},
	{x: 4, y: 35},
	{x: 6, y: 2},
	{x: 8, y: 38},
	{x: 10, y: 40}
	];

	var xScale = d3.scale.linear()
	.domain([0, d3.max(dataset, function(d){ return d.x; })])
	.range([0, width]);

	var yScale = d3.scale.linear()
	.domain([0, d3.max(dataset, function(d){ return d.y; })])
	.range([height, 0]);

	var xAxis = d3.svg.axis()
	.scale(xScale)
	.orient("bottom")
	.innerTickSize(-height)
	.outerTickSize(0)
	.tickPadding(10);

	var yAxis = d3.svg.axis()
	.scale(yScale)
	.orient("left")
	.innerTickSize(-width)
	.outerTickSize(0)
	.tickPadding(10);

	var line = d3.svg.line()
	.x(function(d) { return xScale(d.x); })
	.y(function(d) { return yScale(d.y); })
	.interpolate(function(pts) {
	var res = ""+pts[0];
	for (var i = 0; i < pts.length - 1; i++) {
	var s = 1 / (pts[i+1][0] - pts[i][0]) / 5;
	for (var t = s; t <= 1.0; t += s) {
	var r = Math.max(0, Math.min(1, Math.abs((pts[i+1][1] - pts[i][1]) / (pts[i+1][0] - pts[i][0])))),
	c = t(1-r) + (1 - Math.cos(tMath.PI)) / 2 * r;

	res += "L" + [(1-t)pts[i][0]+tpts[i+1][0], pts[i][1](1-c) + pts[i+1][1]c];
	}
	}

	return res;
	});

	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)

	svg.append("path")
	.data([dataset])
	.attr("class", "line")
	.attr("d", line);
	<!doctype html>
	<html lang="ja">
	<head>
	<meta charset="UTF-8">
	<title>Line Chart</title>
	<style>
	.axis path,
	.axis line{
	fill: none;
	stroke: black;
	}

	.line{
	fill: none;
	stroke: blue;
	stroke-width: 2px;
	}

	.tick text{
	font-size: 12px;
	}

	.tick line{
	opacity: 0.2;
	}
	</style>
	</head>
	<body>
	<script src="http://d3js.org/d3.v3.js"></script>
	<script src="draw.js"></script>
	</body>
	</html>