mbostock/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    A custom line interpolator with horizontal tangents.

  
## data.csv

          
            x
            y

            
              0
              1

            
              1
              5

            
              2
              3

            
              3
              8

            
              4
              5

## 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;
}

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

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

var margin = {top: 20, right: 30, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var x = d3.scale.linear()
    .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()
    .interpolate(interpolateSankey)
    .x(function(d) { return x(d.x); })
    .y(function(d) { return y(d.y); });

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

  data.forEach(function(d) {
    d.x = +d.x;
    d.y = +d.y;
  });

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

  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")
      .datum(data)
      .attr("class", "line")
      .attr("d", line);
});

function interpolateSankey(points) {
  var x0 = points[0][0], y0 = points[0][1], x1, y1, x2,
      path = [x0, ",", y0],
      i = 0,
      n = points.length;
  while (++i < n) {
    x1 = points[i][0], y1 = points[i][1], x2 = (x0 + x1) / 2;
    path.push("C", x2, ",", y0, " ", x2, ",", y1, " ", x1, ",", y1);
    x0 = x1, y0 = y1;
  }
  return path.join("");
}

</script>

## thumbnail.png

      
    Raw
  

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

	body {
	font: 10px sans-serif;
	}

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

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

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

	var margin = {top: 20, right: 30, bottom: 30, left: 40},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	var x = d3.scale.linear()
	.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()
	.interpolate(interpolateSankey)
	.x(function(d) { return x(d.x); })
	.y(function(d) { return y(d.y); });

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

	data.forEach(function(d) {
	d.x = +d.x;
	d.y = +d.y;
	});

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

	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")
	.datum(data)
	.attr("class", "line")
	.attr("d", line);
	});

	function interpolateSankey(points) {
	var x0 = points[0][0], y0 = points[0][1], x1, y1, x2,
	path = [x0, ",", y0],
	i = 0,
	n = points.length;
	while (++i < n) {
	x1 = points[i][0], y1 = points[i][1], x2 = (x0 + x1) / 2;
	path.push("C", x2, ",", y0, " ", x2, ",", y1, " ", x1, ",", y1);
	x0 = x1, y0 = y1;
	}
	return path.join("");
	}

	</script>