rubenfilteris/README.md

## 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

            
              B1
              B2

            
              B2
              B3

            
              B3
              B4

            
              B4
              B5

            
              B5
              B6

            
              B6
              B1

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

.link {
  stroke: #000;
}

.node {
  stroke: #fff;
}

</style>
<body>
<script src="http://d3js.org/d3.v2.js?2.9.3"></script>
<script>

var width = 960,
    height = 500;

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

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

d3.csv("graph.csv", function(links) {
  var nodesByName = {};

  // Create nodes for each unique source and target.
  links.forEach(function(link) {
    link.source = nodeByName(link.source);
    link.target = nodeByName(link.target);
  });

  // Extract the array of nodes from the map by name.
  var nodes = d3.values(nodesByName);

  // Create the link lines.
  var link = svg.selectAll(".link")
      .data(links)
    .enter().append("line")
      .attr("class", "link");

  // Create the node circles.
  var node = svg.selectAll(".node")
      .data(nodes)
    .enter().append("circle")
      .attr("class", "node")
      .attr("r", 4.5)
      .call(force.drag);

  // Start the force layout.
  force
      .nodes(nodes)
      .links(links)
      .on("tick", tick)
      .start();

  function tick() {
    link.attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; });

    node.attr("cx", function(d) { return d.x; })
        .attr("cy", function(d) { return d.y; });
  }

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

</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	.link {
	stroke: #000;
	}

	.node {
	stroke: #fff;
	}

	</style>
	<body>
	<script src="http://d3js.org/d3.v2.js?2.9.3"></script>
	<script>

	var width = 960,
	height = 500;

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height);

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

	d3.csv("graph.csv", function(links) {
	var nodesByName = {};

	// Create nodes for each unique source and target.
	links.forEach(function(link) {
	link.source = nodeByName(link.source);
	link.target = nodeByName(link.target);
	});

	// Extract the array of nodes from the map by name.
	var nodes = d3.values(nodesByName);

	// Create the link lines.
	var link = svg.selectAll(".link")
	.data(links)
	.enter().append("line")
	.attr("class", "link");

	// Create the node circles.
	var node = svg.selectAll(".node")
	.data(nodes)
	.enter().append("circle")
	.attr("class", "node")
	.attr("r", 4.5)
	.call(force.drag);

	// Start the force layout.
	force
	.nodes(nodes)
	.links(links)
	.on("tick", tick)
	.start();

	function tick() {
	link.attr("x1", function(d) { return d.source.x; })
	.attr("y1", function(d) { return d.source.y; })
	.attr("x2", function(d) { return d.target.x; })
	.attr("y2", function(d) { return d.target.y; });

	node.attr("cx", function(d) { return d.x; })
	.attr("cy", function(d) { return d.y; });
	}

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

	</script>