Categorical Foci

Note: Categories randomly assigned.

<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
  <title>Categorical Foci</title>
  <script src="https://code.jquery.com/jquery-1.8.2.js"></script>
  <script src="https://d3js.org/d3.v2.js"></script>
  <script src="https://underscorejs.org/underscore.js"></script>
  <style type="text/css">
body {
  font-family: Verdana, sans-serif;
  font-size: 16px;
  color: #141414;
  margin: 0;
}

#chart .background {
  fill: rgba(255,255,255,0.3);
}

circle {
  stroke: #fff;
}

text.foci-label {
  text-anchor: middle;
  font-size: 24px;
  opacity: 0.5;
  font-weight: bold;
  cursor: move;
}
text.foci-label:hover {
  fill: #888;
}

#chart .entity {
  font-size: 15px;
  text-anchor: middle;
}
  </style>
</head>
<body>
    <div id="chart"></div>
</div>
    <script type="text/javascript">

/* Data*/

var tag = ["Corporation", "Government", "Environment"];

var entities = [
  {
    "name": "European Environment Agency",
    "abbrev": "EEA",
    "wikipedia": "https://en.wikipedia.org/wiki/European_Environment_Agency",
    "tags": ["Environment", "Government"]
  },
  {
    "name": "National Oceanic and Atmospheric Association",
    "abbrev": "NOAA",
    "wikipedia": "https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospheric_Administration",
    "tags": ["Government", "Environment"]
  },
  {
    "name": "Bureau of Labor Statistics",
    "abbrev": "BLS",
    "wikipedia": "https://en.wikipedia.org/wiki/Bureau_of_Labor_Statistics",
    "tags": ["Government", "Labor", "Economics"]
  },
  {
    "name": "Microsoft",
    "abbrev": "Microsoft",
    "wikipedia": "https://en.wikipedia.org/wiki/Microsoft",
    "tags": ["Corporation", "Government"]
  },
  {
    "name": "Tesla Motors",
    "abbrev": "Tesla",
    "wikipedia": "https://en.wikipedia.org/wiki/Tesla_motors",
    "tags": ["Corporation"]
  },
  {
    "name": "Intergovernmental Panel on Climate Change",
    "abbrev": "IPCC",
    "wikipedia": "https://en.wikipedia.org/wiki/Intergovernmental_Panel_on_Climate_Change",
    "tags": ["Environment", "Government"]
  },
  {
    "name": "Environmental Protection Agency",
    "abbrev": "EPA",
    "wikipedia": "https://en.wikipedia.org/wiki/Environmental_Protection_Agency",
    "tags": ["Environment", "Government"]
  },
  {
    "name": "United States Geological Survey",
    "abbrev": "USGS",
    "wikipedia": "https://en.wikipedia.org/wiki/United_States_Geological_Survey",
    "tags": ["Environment", "Government"]
  },
  {
    "name": "ExxonMobil",
    "abbrev": "Exxon",
    "wikipedia": "https://en.wikipedia.org/wiki/ExxonMobil",
    "tags": ["Corporation", "Environment", "Energy"]
  },
  {
    "name": "PetroChina",
    "abbrev": "PetroChina",
    "wikipedia": "https://en.wikipedia.org/wiki/PetroChina",
    "tags": ["Corporation", "Environment", "Energy"]
  },
  {
    "name": "General Electric",
    "abbrev": "GE",
    "wikipedia": "https://en.wikipedia.org/wiki/General_Electric",
    "tags": ["Corporation", "Environment", "Manufacturing", "Energy"]
  },
  {
    "name": "Pfizer",
    "abbrev": "Pfizer",
    "wikipedia": "https://en.wikipedia.org/wiki/Pfizer",
    "tags": ["Corporation", "Pharmaceutical", "Manufacturing"]
  },
  {
    "name": "Samsung",
    "abbrev": "Samsung",
    "wikipedia": "https://en.wikipedia.org/wiki/Samsung",
    "tags": ["Corporation", "Manufacturing"]
  },
  {
    "name": "Toyota",
    "abbrev": "Toyota",
    "wikipedia": "https://en.wikipedia.org/wiki/Toyota",
    "tags": ["Corporation", "Manufacturing"]
  },
  {
    "name": "Siemens",
    "abbrev": "Siemens",
    "wikipedia": "https://en.wikipedia.org/wiki/Siemens",
    "tags": ["Corporation", "Environment", "Manufacturing", "Energy"]
  }
]
/* Chart */

var width = 960,
    height = 500,
    color = d3.scale.category10().domain([1, 2, 4]);

var force = d3.layout.force()
    .gravity(0)
    .charge(-120)
    .size([width, height]);

var nodes = force.nodes(),
    a = {type: 1, x: 3 * width / 6, y: 2 * height / 6, fixed: true},
    b = {type: 2, x: 3 * width / 4, y: 4 * height / 6, fixed: true},
    c = {type: 4, x: 1 * width / 4, y: 4 * height / 6, fixed: true};

nodes.push(a, b, c);

var svg = d3.select("#chart").append("svg:svg")
    .attr("width", width)
    .attr("height", height);

svg.append("svg:rect")
    .attr("class", "background")
    .attr("width", width)
    .attr("height", height);

svg.selectAll("text")
    .data(nodes)
  .enter().append("svg:text")
    .attr("class", "foci-label")
    .attr("x", function(d) { return d.x; })
    .attr("y", function(d) { return d.y; })
    .style("fill", fill)
    .text(function(d,i) { return tag[i]; })
    .call(force.drag);

force.on("tick", function(e,i) {
  var k = e.alpha * .1;

nodes.forEach(function(node) {
    if (node.type & 1) {
      node.x += (a.x - node.x) * k;
      node.y += (a.y - node.y) * k;
    }
    if (node.type & 2) {
      node.x += (b.x - node.x) * k;
      node.y += (b.y - node.y) * k;
    }
    if (node.type & 4) {
      node.x += (c.x - node.x) * k;
      node.y += (c.y - node.y) * k;
    }
  });

svg.selectAll("text.foci-label")
    .attr("x", function(d) { return d.x; })
    .attr("y", function(d) { return d.y; })

svg.selectAll("g.entity")
    .style("display", null)
    .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
});

_(entities).each(function(d) {
  node = {type: (Math.random() * 7 + 1) | 0, x: width*(0.75 - 0.5*Math.random()), y: height*(0.75 - 0.5*Math.random())};

var g = svg.append("svg:g")
    .data([node])  
    .style("display", "none")
    .attr("class", "entity")
    .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });

g.append("circle")
    .data([node])  
    .attr("r", 6)
    .style("fill", fill);

g.append("text")
    .attr("y", -8)
    .text(d.abbrev);

nodes.push(node);
});

force.start();

function fill(d) {
  return color(d.type);
}

</script>
  </body>
</html>

Modified http://code.jquery.com/jquery-1.8.2.js to a secure url

Modified http://d3js.org/d3.v2.js to a secure url

Modified http://underscorejs.org/underscore.js to a secure url

https://code.jquery.com/jquery-1.8.2.js

https://d3js.org/d3.v2.js

https://underscorejs.org/underscore.js