ngopal/graph_edges.csv

## graph_edges.csv

          
            source
            target

            
              A1
              A2

            
              A2
              A3

            
              A2
              A4

## index.html
<!DOCTYPE html>
<html>
<head>
  <style>
    .link {
  stroke: #000;
}

.node {
  stroke: #fff;
}
  </style>
<script src="http://code.jquery.com/jquery-2.1.0.min.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script type="text/javascript">
  // D3 small multiples with force-directed graphs example
// with borrowed materical from this block: http://bl.ocks.org/mbostock/2949937

var width = 300;
var height = 300;

var svgOne = d3.select("#one")
      .attr("width", width)
      .attr("height", height);

var svgTwo = d3.select("#two")
      .attr("width", width)
      .attr("height", height);

// force code below

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

d3.csv("graph_edges.csv", function(error, links) {
  if (error !== null) {
    console.log(error);
  }
  else {
    console.log(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 = svgOne.selectAll(".link")
        .data(links)
      .enter().append("line")
        .attr("class", "link");

    // Create the node circles.
    var node = svgOne.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();

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

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

    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; });

       linkTwo.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; });

       nodeTwo.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>
</head>
<body>
  <svg id="one"></svg>
  <svg id="two"></svg>
</body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<style>
	.link {
	stroke: #000;
	}

	.node {
	stroke: #fff;
	}
	</style>
	<script src="http://code.jquery.com/jquery-2.1.0.min.js"></script>
	<meta charset="utf-8">
	<title>JS Bin</title>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script type="text/javascript">
	// D3 small multiples with force-directed graphs example
	// with borrowed materical from this block: http://bl.ocks.org/mbostock/2949937

	var width = 300;
	var height = 300;

	var svgOne = d3.select("#one")
	.attr("width", width)
	.attr("height", height);

	var svgTwo = d3.select("#two")
	.attr("width", width)
	.attr("height", height);

	// force code below

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

	d3.csv("graph_edges.csv", function(error, links) {
	if (error !== null) {
	console.log(error);
	}
	else {
	console.log(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 = svgOne.selectAll(".link")
	.data(links)
	.enter().append("line")
	.attr("class", "link");

	// Create the node circles.
	var node = svgOne.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();

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

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

	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; });

	linkTwo.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; });

	nodeTwo.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>
	</head>
	<body>
	<svg id="one"></svg>
	<svg id="two"></svg>
	</body>
	</html>