mbostock/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    In response to a Stack Overflow question, How to convert to D3's JSON format?.

  
## graph.csv

          
            source
            target

            
              A1
              A2

            
              A2
              A3

            
              A2
              A4

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

.link {
  fill: none;
  stroke: #000;
}

.node {
  stroke: #fff;
}

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

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

var tree = d3.layout.tree()
    .size([height, width]);

var diagonal = d3.svg.diagonal()
    .projection(function(d) { return [d.y, d.x]; });

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

  var nodesByName = {};

  // Create nodes for each unique source and target.
  links.forEach(function(link) {
    var parent = link.source = nodeByName(link.source),
        child = link.target = nodeByName(link.target);
    if (parent.children) parent.children.push(child);
    else parent.children = [child];
  });

  // Extract the root node and compute the layout.
  var nodes = tree.nodes(links[0].source);

  // Create the link lines.
  svg.selectAll(".link")
      .data(links)
    .enter().append("path")
      .attr("class", "link")
      .attr("d", diagonal);

  // Create the node circles.
  svg.selectAll(".node")
      .data(nodes)
    .enter().append("circle")
      .attr("class", "node")
      .attr("r", 4.5)
      .attr("cx", function(d) { return d.y; })
      .attr("cy", function(d) { return d.x; });

  function nodeByName(name) {
    return nodesByName[name] || (nodesByName[name] = {name: name});
  }
});

</script>

## thumbnail.png

      
    Raw
  

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

	.link {
	fill: none;
	stroke: #000;
	}

	.node {
	stroke: #fff;
	}

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

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

	var tree = d3.layout.tree()
	.size([height, width]);

	var diagonal = d3.svg.diagonal()
	.projection(function(d) { return [d.y, d.x]; });

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

	var nodesByName = {};

	// Create nodes for each unique source and target.
	links.forEach(function(link) {
	var parent = link.source = nodeByName(link.source),
	child = link.target = nodeByName(link.target);
	if (parent.children) parent.children.push(child);
	else parent.children = [child];
	});

	// Extract the root node and compute the layout.
	var nodes = tree.nodes(links[0].source);

	// Create the link lines.
	svg.selectAll(".link")
	.data(links)
	.enter().append("path")
	.attr("class", "link")
	.attr("d", diagonal);

	// Create the node circles.
	svg.selectAll(".node")
	.data(nodes)
	.enter().append("circle")
	.attr("class", "node")
	.attr("r", 4.5)
	.attr("cx", function(d) { return d.y; })
	.attr("cy", function(d) { return d.x; });

	function nodeByName(name) {
	return nodesByName[name] \|\| (nodesByName[name] = {name: name});
	}
	});

	</script>