stv0g/.block

## .block
license: gpl-3.0
height: 600

## README.md

      
    Raw
  

              README.md
            
          
    This simple force-directed graph shows character co-occurence in Les Misérables. A physical simulation of charged particles and springs places related characters in closer proximity, while unrelated characters are farther apart. Layout algorithm inspired by Tim Dwyer and Thomas Jakobsen. Data based on character coappearence in Victor Hugo's Les Misérables, compiled by Donald Knuth.
Compare this display to a force layout with curved links, a force layout with fisheye distortion and a matrix diagram.

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

.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}

.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}

</style>
<svg width="960" height="600"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

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

var color = d3.scaleOrdinal(d3.schemeCategory20);

var simulation = d3.forceSimulation()
    .force("link", d3.forceLink().id(function(d) { return d.id; }))
    .force("charge", d3.forceManyBody())
    .force("center", d3.forceCenter(width / 2, height / 2));

d3.json("miserables.json", function(error, graph) {
  if (error) throw error;

  var link = svg.append("g")
      .attr("class", "links")
    .selectAll("line")
    .data(graph.links)
    .enter().append("line")
      .attr("stroke-width", function(d) { return Math.sqrt(d.value); });

  var node = svg.append("g")
      .attr("class", "nodes")
    .selectAll("circle")
    .data(graph.nodes)
    .enter().append("circle")
      .attr("r", 5)
      .attr("fill", function(d) { return color(d.group); })
      .call(d3.drag()
          .on("start", dragstarted)
          .on("drag", dragged)
          .on("end", dragended));

  node.append("title")
      .text(function(d) { return d.id; });

  simulation
      .nodes(graph.nodes)
      .on("tick", ticked);

  simulation.force("link")
      .links(graph.links);

  function ticked() {
    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 dragstarted(d) {
  if (!d3.event.active) simulation.alphaTarget(0.3).restart();
  d.fx = d.x;
  d.fy = d.y;
}

function dragged(d) {
  d.fx = d3.event.x;
  d.fy = d3.event.y;
}

function dragended(d) {
  if (!d3.event.active) simulation.alphaTarget(0);
  d.fx = null;
  d.fy = null;
}

</script>

## miserables.json
{
  "nodes": [
    {"id": "ACS", "group": 1},
    {"id": "WIT", "group": 2},
    {"id": "UPB", "group": 3},
    {"id": "POLITO", "group": 4}
  ],
  "links": [
    {"source": "ACS", "target": "UPB", "value": 319 },
    {"source": "ACS", "target": "POLITO", "value": 235 },
    {"source": "ACS", "target": "WIT", "value": 477 },
    {"source": "WIT", "target": "UPB", "value": 596 },
    {"source": "WIT", "target": "POLITO", "value": 381 },
    {"source": "POLITO", "target": "UPB", "value": 410 }
  ]
}

## preview.png

      
    Raw
  

              preview.png
            
          
## thumbnail.png

      
    Raw
  

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

	.links line {
	stroke: #999;
	stroke-opacity: 0.6;
	}

	.nodes circle {
	stroke: #fff;
	stroke-width: 1.5px;
	}

	</style>
	<svg width="960" height="600"></svg>
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<script>

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

	var color = d3.scaleOrdinal(d3.schemeCategory20);

	var simulation = d3.forceSimulation()
	.force("link", d3.forceLink().id(function(d) { return d.id; }))
	.force("charge", d3.forceManyBody())
	.force("center", d3.forceCenter(width / 2, height / 2));

	d3.json("miserables.json", function(error, graph) {
	if (error) throw error;

	var link = svg.append("g")
	.attr("class", "links")
	.selectAll("line")
	.data(graph.links)
	.enter().append("line")
	.attr("stroke-width", function(d) { return Math.sqrt(d.value); });

	var node = svg.append("g")
	.attr("class", "nodes")
	.selectAll("circle")
	.data(graph.nodes)
	.enter().append("circle")
	.attr("r", 5)
	.attr("fill", function(d) { return color(d.group); })
	.call(d3.drag()
	.on("start", dragstarted)
	.on("drag", dragged)
	.on("end", dragended));

	node.append("title")
	.text(function(d) { return d.id; });

	simulation
	.nodes(graph.nodes)
	.on("tick", ticked);

	simulation.force("link")
	.links(graph.links);

	function ticked() {
	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 dragstarted(d) {
	if (!d3.event.active) simulation.alphaTarget(0.3).restart();
	d.fx = d.x;
	d.fy = d.y;
	}

	function dragged(d) {
	d.fx = d3.event.x;
	d.fy = d3.event.y;
	}

	function dragended(d) {
	if (!d3.event.active) simulation.alphaTarget(0);
	d.fx = null;
	d.fy = null;
	}

	</script>
	{
	"nodes": [
	{"id": "ACS", "group": 1},
	{"id": "WIT", "group": 2},
	{"id": "UPB", "group": 3},
	{"id": "POLITO", "group": 4}
	],
	"links": [
	{"source": "ACS", "target": "UPB", "value": 319 },
	{"source": "ACS", "target": "POLITO", "value": 235 },
	{"source": "ACS", "target": "WIT", "value": 477 },
	{"source": "WIT", "target": "UPB", "value": 596 },
	{"source": "WIT", "target": "POLITO", "value": 381 },
	{"source": "POLITO", "target": "UPB", "value": 410 }
	]
	}