mbostock/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    A variation on the elbow dendrogram, though using the tree layout. A couple notes: a custom separation function is used so that the distance between sets of parents is half the distance between parents themselves; the tree layout draws the leaf nodes at the right extreme of the layout, so a large right margin is used to inset the leaf nodes; the leaf nodes also have a custom path (d.target.children is null).
In response to a Stack Overflow question.

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

text {
  font-family: "Helvetica Neue", Helvetica, sans-serif;
}

.name {
  font-weight: bold;
}

.about {
  fill: #777;
  font-size: smaller;
}

.link {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

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

var margin = {top: 0, right: 320, bottom: 0, left: 0},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var tree = d3.layout.tree()
    .separation(function(a, b) { return a.parent === b.parent ? 1 : .5; })
    .children(function(d) { return d.parents; })
    .size([height, width]);

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.json("tree.json", function(error, json) {
  if (error) throw error;

  var nodes = tree.nodes(json);

  var link = svg.selectAll(".link")
      .data(tree.links(nodes))
    .enter().append("path")
      .attr("class", "link")
      .attr("d", elbow);

  var node = svg.selectAll(".node")
      .data(nodes)
    .enter().append("g")
      .attr("class", "node")
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })

  node.append("text")
      .attr("class", "name")
      .attr("x", 8)
      .attr("y", -6)
      .text(function(d) { return d.name; });

  node.append("text")
      .attr("x", 8)
      .attr("y", 8)
      .attr("dy", ".71em")
      .attr("class", "about lifespan")
      .text(function(d) { return d.born + "–" + d.died; });

  node.append("text")
      .attr("x", 8)
      .attr("y", 8)
      .attr("dy", "1.86em")
      .attr("class", "about location")
      .text(function(d) { return d.location; });
});

function elbow(d, i) {
  return "M" + d.source.y + "," + d.source.x
       + "H" + d.target.y + "V" + d.target.x
       + (d.target.children ? "" : "h" + margin.right);
}

</script>

## thumbnail.png

      
    Raw
  

              thumbnail.png
            
          
## tree.json
{
  "name": "Clifford Shanks",
  "born": 1862,
  "died": 1906,
  "location": "Petersburg, VA",
  "parents": [
    {
      "name": "James Shanks",
      "born": 1831,
      "died": 1884,
      "location": "Petersburg, VA",
      "parents": [
        {
          "name": "Robert Shanks",
          "born": 1781,
          "died": 1871,
          "location": "Ireland/Petersburg, VA"
        },
        {
          "name": "Elizabeth Shanks",
          "born": 1795,
          "died": 1871,
          "location": "Ireland/Petersburg, VA"
        }
      ]
    },
    {
      "name": "Ann Emily Brown",
      "born": 1826,
      "died": 1866,
      "location": "Brunswick/Petersburg, VA",
      "parents": [
        {
          "name": "Henry Brown",
          "born": 1792,
          "died": 1845,
          "location": "Montgomery, NC"
        },
        {
          "name": "Sarah Houchins",
          "born": 1793,
          "died": 1882,
          "location": "Montgomery, NC"
        }
      ]
    }
  ]
}
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	text {
	font-family: "Helvetica Neue", Helvetica, sans-serif;
	}

	.name {
	font-weight: bold;
	}

	.about {
	fill: #777;
	font-size: smaller;
	}

	.link {
	fill: none;
	stroke: #000;
	shape-rendering: crispEdges;
	}

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

	var margin = {top: 0, right: 320, bottom: 0, left: 0},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	var tree = d3.layout.tree()
	.separation(function(a, b) { return a.parent === b.parent ? 1 : .5; })
	.children(function(d) { return d.parents; })
	.size([height, width]);

	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.json("tree.json", function(error, json) {
	if (error) throw error;

	var nodes = tree.nodes(json);

	var link = svg.selectAll(".link")
	.data(tree.links(nodes))
	.enter().append("path")
	.attr("class", "link")
	.attr("d", elbow);

	var node = svg.selectAll(".node")
	.data(nodes)
	.enter().append("g")
	.attr("class", "node")
	.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })

	node.append("text")
	.attr("class", "name")
	.attr("x", 8)
	.attr("y", -6)
	.text(function(d) { return d.name; });

	node.append("text")
	.attr("x", 8)
	.attr("y", 8)
	.attr("dy", ".71em")
	.attr("class", "about lifespan")
	.text(function(d) { return d.born + "–" + d.died; });

	node.append("text")
	.attr("x", 8)
	.attr("y", 8)
	.attr("dy", "1.86em")
	.attr("class", "about location")
	.text(function(d) { return d.location; });
	});

	function elbow(d, i) {
	return "M" + d.source.y + "," + d.source.x
	+ "H" + d.target.y + "V" + d.target.x
	+ (d.target.children ? "" : "h" + margin.right);
	}

	</script>
	{
	"name": "Clifford Shanks",
	"born": 1862,
	"died": 1906,
	"location": "Petersburg, VA",
	"parents": [
	{
	"name": "James Shanks",
	"born": 1831,
	"died": 1884,
	"location": "Petersburg, VA",
	"parents": [
	{
	"name": "Robert Shanks",
	"born": 1781,
	"died": 1871,
	"location": "Ireland/Petersburg, VA"
	},
	{
	"name": "Elizabeth Shanks",
	"born": 1795,
	"died": 1871,
	"location": "Ireland/Petersburg, VA"
	}
	]
	},
	{
	"name": "Ann Emily Brown",
	"born": 1826,
	"died": 1866,
	"location": "Brunswick/Petersburg, VA",
	"parents": [
	{
	"name": "Henry Brown",
	"born": 1792,
	"died": 1845,
	"location": "Montgomery, NC"
	},
	{
	"name": "Sarah Houchins",
	"born": 1793,
	"died": 1882,
	"location": "Montgomery, NC"
	}
	]
	}
	]
	}