This graph combines force directed graphs, zooming and dragging, and the explanation behind the graph is available here.
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March 10, 2018 15:49
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Zoomable Force Directed Graph d3v4
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.links line { | |
stroke: #999; | |
stroke-opacity: 0.6; | |
} | |
.nodes circle { | |
stroke: black ; | |
stroke-width: 0px; | |
} | |
</style> | |
<svg width="800" height="500"></svg> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script> | |
//create somewhere to put the force directed graph | |
var svg = d3.select("svg"), | |
width = +svg.attr("width"), | |
height = +svg.attr("height"); | |
var radius = 15; | |
var nodes_data = [ | |
{"name": "Lillian", "sex": "F"}, | |
{"name": "Gordon", "sex": "M"}, | |
{"name": "Sylvester", "sex": "M"}, | |
{"name": "Mary", "sex": "F"}, | |
{"name": "Helen", "sex": "F"}, | |
{"name": "Jamie", "sex": "M"}, | |
{"name": "Jessie", "sex": "F"}, | |
{"name": "Ashton", "sex": "M"}, | |
{"name": "Duncan", "sex": "M"}, | |
{"name": "Evette", "sex": "F"}, | |
{"name": "Mauer", "sex": "M"}, | |
{"name": "Fray", "sex": "F"}, | |
{"name": "Duke", "sex": "M"}, | |
{"name": "Baron", "sex": "M"}, | |
{"name": "Infante", "sex": "M"}, | |
{"name": "Percy", "sex": "M"}, | |
{"name": "Cynthia", "sex": "F"}, | |
{"name": "Feyton", "sex": "M"}, | |
{"name": "Lesley", "sex": "F"}, | |
{"name": "Yvette", "sex": "F"}, | |
{"name": "Maria", "sex": "F"}, | |
{"name": "Lexy", "sex": "F"}, | |
{"name": "Peter", "sex": "M"}, | |
{"name": "Ashley", "sex": "F"}, | |
{"name": "Finkler", "sex": "M"}, | |
{"name": "Damo", "sex": "M"}, | |
{"name": "Imogen", "sex": "F"} | |
] | |
//Sample links data | |
//type: A for Ally, E for Enemy | |
var links_data = [ | |
{"source": "Sylvester", "target": "Gordon", "type":"A" }, | |
{"source": "Sylvester", "target": "Lillian", "type":"A" }, | |
{"source": "Sylvester", "target": "Mary", "type":"A"}, | |
{"source": "Sylvester", "target": "Jamie", "type":"A"}, | |
{"source": "Sylvester", "target": "Jessie", "type":"A"}, | |
{"source": "Sylvester", "target": "Helen", "type":"A"}, | |
{"source": "Helen", "target": "Gordon", "type":"A"}, | |
{"source": "Mary", "target": "Lillian", "type":"A"}, | |
{"source": "Ashton", "target": "Mary", "type":"A"}, | |
{"source": "Duncan", "target": "Jamie", "type":"A"}, | |
{"source": "Gordon", "target": "Jessie", "type":"A"}, | |
{"source": "Sylvester", "target": "Fray", "type":"E"}, | |
{"source": "Fray", "target": "Mauer", "type":"A"}, | |
{"source": "Fray", "target": "Cynthia", "type":"A"}, | |
{"source": "Fray", "target": "Percy", "type":"A"}, | |
{"source": "Percy", "target": "Cynthia", "type":"A"}, | |
{"source": "Infante", "target": "Duke", "type":"A"}, | |
{"source": "Duke", "target": "Gordon", "type":"A"}, | |
{"source": "Duke", "target": "Sylvester", "type":"A"}, | |
{"source": "Baron", "target": "Duke", "type":"A"}, | |
{"source": "Baron", "target": "Sylvester", "type":"E"}, | |
{"source": "Evette", "target": "Sylvester", "type":"E"}, | |
{"source": "Cynthia", "target": "Sylvester", "type":"E"}, | |
{"source": "Cynthia", "target": "Jamie", "type":"E"}, | |
{"source": "Mauer", "target": "Jessie", "type":"E"}, | |
{"source": "Duke", "target": "Lexy", "type":"A"}, | |
{"source": "Feyton", "target": "Lexy", "type":"A"}, | |
{"source": "Maria", "target": "Feyton", "type":"A"}, | |
{"source": "Baron", "target": "Yvette", "type":"E"}, | |
{"source": "Evette", "target": "Maria", "type":"E"}, | |
{"source": "Cynthia", "target": "Yvette", "type":"E"}, | |
{"source": "Maria", "target": "Jamie", "type":"E"}, | |
{"source": "Maria", "target": "Lesley", "type":"E"}, | |
{"source": "Ashley", "target": "Damo", "type":"A"}, | |
{"source": "Damo", "target": "Lexy", "type":"A"}, | |
{"source": "Maria", "target": "Feyton", "type":"A"}, | |
{"source": "Finkler", "target": "Ashley", "type":"E"}, | |
{"source": "Sylvester", "target": "Maria", "type":"E"}, | |
{"source": "Peter", "target": "Finkler", "type":"E"}, | |
{"source": "Ashley", "target": "Gordon", "type":"E"}, | |
{"source": "Maria", "target": "Imogen", "type":"E"} | |
] | |
//set up the simulation and add forces | |
var simulation = d3.forceSimulation() | |
.nodes(nodes_data); | |
var link_force = d3.forceLink(links_data) | |
.id(function(d) { return d.name; }); | |
var charge_force = d3.forceManyBody() | |
.strength(-100); | |
var center_force = d3.forceCenter(width / 2, height / 2); | |
simulation | |
.force("charge_force", charge_force) | |
.force("center_force", center_force) | |
.force("links",link_force) | |
; | |
//add tick instructions: | |
simulation.on("tick", tickActions ); | |
//add encompassing group for the zoom | |
var g = svg.append("g") | |
.attr("class", "everything"); | |
//draw lines for the links | |
var link = g.append("g") | |
.attr("class", "links") | |
.selectAll("line") | |
.data(links_data) | |
.enter().append("line") | |
.attr("stroke-width", 2) | |
.style("stroke", linkColour); | |
//draw circles for the nodes | |
var node = g.append("g") | |
.attr("class", "nodes") | |
.selectAll("circle") | |
.data(nodes_data) | |
.enter() | |
.append("circle") | |
.attr("r", radius) | |
.attr("fill", circleColour); | |
//add drag capabilities | |
var drag_handler = d3.drag() | |
.on("start", drag_start) | |
.on("drag", drag_drag) | |
.on("end", drag_end); | |
drag_handler(node); | |
//add zoom capabilities | |
var zoom_handler = d3.zoom() | |
.on("zoom", zoom_actions); | |
zoom_handler(svg); | |
/** Functions **/ | |
//Function to choose what color circle we have | |
//Let's return blue for males and red for females | |
function circleColour(d){ | |
if(d.sex =="M"){ | |
return "blue"; | |
} else { | |
return "pink"; | |
} | |
} | |
//Function to choose the line colour and thickness | |
//If the link type is "A" return green | |
//If the link type is "E" return red | |
function linkColour(d){ | |
if(d.type == "A"){ | |
return "green"; | |
} else { | |
return "red"; | |
} | |
} | |
//Drag functions | |
//d is the node | |
function drag_start(d) { | |
if (!d3.event.active) simulation.alphaTarget(0.3).restart(); | |
d.fx = d.x; | |
d.fy = d.y; | |
} | |
//make sure you can't drag the circle outside the box | |
function drag_drag(d) { | |
d.fx = d3.event.x; | |
d.fy = d3.event.y; | |
} | |
function drag_end(d) { | |
if (!d3.event.active) simulation.alphaTarget(0); | |
d.fx = null; | |
d.fy = null; | |
} | |
//Zoom functions | |
function zoom_actions(){ | |
g.attr("transform", d3.event.transform) | |
} | |
function tickActions() { | |
//update circle positions each tick of the simulation | |
node | |
.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }); | |
//update link positions | |
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; }); | |
} | |
</script> |
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