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<!DOCTYPE html>
<html lang="en">
<head>
<!-- Global site tag (gtag.js) - Google Analytics -->
<!-- Allow Ezoic to place ads on the page -->
<script type="text/javascript">
var ezstandalone = ezstandalone || {};
ezstandalone.cmd = ezstandalone.cmd || [];
ezstandalone.cmd.push(function() {
ezstandalone.define(101,102,103,105);
ezstandalone.enable();
ezstandalone.display();
});
</script>
<script src="//www.ezojs.com/ezoic/sa.min.js"></script>
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<script>
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function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-79254642-6');
</script>
<meta charset="utf-8">
<title>Arc diagram | the D3 Graph Gallery</title>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="Arc diagram with Javascript and D3.js: a set of simple examples with reproducible code.">
<meta name="keywords" content="Data,Dataviz,Datavisualization,Javascript,D3,D3.js,sankey, flow chart">
<meta name="author" content="Yan Holtz">
<link rel="icon" href="img/logo/D3_single_small.png">
<meta property="og:title" content="Arc diagram | the D3 Graph Gallery">
<meta property="og:image" content="img/overview_RGG.png">
<meta property="og:description" content="Arc diagram with Javascript and D3.js: a set of simple examples with reproducible code.">
<!-- Bootstrap core CSS -->
<link href="vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<!-- Custom fonts for this template -->
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<!-- Custom styles for this template -->
<link href="css/agency.css" rel="stylesheet">
<!-- JQUERY -->
<script src="vendor/jquery/jquery.min.js"></script>
<!-- PRISM -->
<script src="LIB/prism.js"></script>
<link href="LIB/prism.css" rel="stylesheet" />
<!-- D3.JS v4 -->
<script src="js/d3.v4.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
</head>
<body id="page-top">
<!-- THIS ALLOWS TO INSERT THE MENU THAT IS STORED IN A MENU.HTML FILE-->
<nav class="navbar navbar-expand-lg fixed-top" id="mainNav"></nav>
<script>
$(function(){
$("#mainNav").load("html_chunk/menu.html");
});
</script>
<!-- THIS ALLOWS TO INSERT THE MODAL OF THE MENU THAT IS STORED IN A MENU_MODAL.HTML FILE-->
<div id="modal_menu_insertion"> </div>
<script>
$(function(){
$("#modal_menu_insertion").load("html_chunk/menu_modal.html");
});
</script>
<!-- Header -->
<header class="masthead" style="padding-top: 150px; padding-bottom: 80px">
<div class="textlanding">
<h1>Arc diagram</h1>
<hr class="short_hr">
<br>
<ul class="list-inline social-buttons">
<li class="list-inline-item">
<a href="https://twitter.com/R_Graph_Gallery">
<i class="fa fa-twitter"></i>
</a>
</li>
<li class="list-inline-item social-buttons">
<a href="https://github.com/holtzy">
<i class="fa fa-github" style="color: white"></i>
</a>
</li>
<li class="list-inline-item social-buttons">
<a href="https://www.linkedin.com/in/yan-holtz-2477534a/">
<i class="fa fa-linkedin"></i>
</a>
</li>
<li class="list-inline-item social-buttons">
<a href="https://www.yan-holtz.com">
<i class="fa fa-home"></i>
</a>
</li>
</ul>
<br><br>
<p style="max-width: 700px; margin: auto">An <a href="https://www.data-to-viz.com/graph/arc.html">arc diagram</a> is a special kind of <a href="network.html">network</a> graph. It is constituted by <u>nodes</u> that represent entities and by <u>links</u> that show relationships between entities. In arc diagrams, nodes are displayed along a <u>single axis</u> and links are represented with <u>arcs</u></p>
</div>
</header>
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<script>
$(function(){
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<!-- ======================== PORTFOLIO SECTION ============================ --><!-- Images must be 480 x 480, resize them with ./script_reformat_img.sh output_name.png -->
<section class="bg" id="portfolio" style="padding-top: 10px">
<div class="container">
<p class="mySeryTitle">A note on input data format</p>
<hr>
<p>
Building an arc diagram requires information on <u>nodes</u> and <u>links</u>. This information can be stored in many different format as described <a href="https://www.data-to-viz.com/graph/network.html">here</a>.
<code>Json</code> format is the most convenient way to work with <code>d3.js</code> and looks basically like that:
</p>
<div id="summary">
<div class="collapse" id="collapseSummary">
<pre class="language-js"><code id="codejs" contenteditable="false"><xmp>{ "nodes": [
{ "id": 1, "name": "A" },
{ "id": 2, "name": "B" }
],
"links": [
{ "source": 1, "target": 2 }
]}</xmp></code></pre>
<p>It is unlikely that your data are currently at this format. You probably need to <u>reformat</u> your data first using another tool like <code>R</code>. The <a href="graph/network_data_format.html">following document</a> gives a few example on how to reformat the most common types of input to get a <code>json</code> file.</p>
<a class="btn btn-secondary btn-md text-uppercase" href="graph/network_data_format.html">Reformat your data to Json</a>
</div>
<a class="collapsed" data-toggle="collapse" href="#collapseSummary" aria-expanded="false" aria-controls="collapseSummary"></a>
</div>
<br><br><br><br>
<div class="mySeryTitle">Step by step</div>
<hr>
<p>The following most <a href="graph/arc_basic.html">basic arc diagram</a> will guide you through the core steps of this chart. Next charts show how to turn it <a href="graph/arc_vertical.html">vertical</a> and how to <a href="graph/arc_highlight.html">highlight links</a> on hover.</p>
<div id="portfolio-items" class="row">
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/arc_basic.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Most basic</p>
<hr>
<p class="explanation_portfolio">The most basic arc diagram you can do in d3.js. Keeping only the core code.</p>
</div>
</div>
<img class="img-fluid" src="img/graph/arc_basic.png" alt="">
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/arc_vertical.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Vertical version</p>
<hr>
<p class="explanation_portfolio">Just a variation putting the nodes along a vertical line</p>
</div>
</div>
<img class="img-fluid" src="img/graph/arc_vertical.png" alt="">
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/arc_highlight.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Highlights a node</p>
<hr>
<p class="explanation_portfolio">Hover a node to highlight all its related links.</p>
</div>
</div>
<img class="img-fluid" src="img/graph/arc_highlight.gif" alt="">
</a>
</div>
</div>
<br><br><br><br>
<div class="mySeryTitle">Template</div>
<hr>
<p>Here is an arc diagram showing the relationships between researchers. One <u>node</u> is drawn for each researcher having published at least one paper with my previous supervisor, <a href="https://sites.google.com/site/ranwez/">Vincent Ranwez</a>. Two researchers are <u>linked</u> if they co-authored at least one paper together. Read more about this dataset <a href="https://www.data-to-viz.com/story/AdjacencyMatrix.html">here</a>.</p>
<p>Hover nodes for more info</p>
<a class="btn btn-secondary btn-md text-uppercase" href="graph/arc_template.html">See code</a>
<div id="my_dataviz"></div>
<br><br><br><br>
<div class="mySeryTitle">Selection of blocks</div>
<hr>
<p>A few blocks with more complicated codes to showcase what's possible to do with arc diagram.</p>
<div id="portfolio-items" class="row">
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="https://bl.ocks.org/rpgove/53bb49d6ed762139f33bdaea1f3a9e1c">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Highlight links</p>
<hr>
<p class="explanation_portfolio">This block shows how to highlight all links of a node on hover.</p>
</div>
</div>
<img class="img-fluid showBlock" src="img/block/block_arcHover.png" alt="Arc diagram highlight">
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="http://bl.ocks.org/mayblue9/dcc49ef6e3888f37f755177c4a248f2c">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Button for order</p>
<hr>
<p class="explanation_portfolio">Add a button that controls node order along the axis.</p>
</div>
</div>
<img class="img-fluid showBlock" src="img/block/block_arcbutton.png" alt="Arc diagram highlight">
</a>
</div>
</div>
</div>
</section>
<!-- ======================================================================= -->
<!-- ================== TEMPLATE CHART ===================================================== -->
<script>
// set the dimensions and margins of the graph
var margin = {top: 0, right: 30, bottom: 80, left: 60},
width = 1170 - margin.left - margin.right,
height = 640 - margin.top - margin.bottom;
// append the svg object to the body of the page
var svg = d3.select("#my_dataviz")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");
// Read dummy data
d3.json("https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/data_researcherNetwork.json", function( data) {
// List of node names
var allNodes = data.nodes.map(function(d){return d.name})
// List of groups
var allGroups = data.nodes.map(function(d){return d.grp})
allGroups = [...new Set(allGroups)]
// A color scale for groups:
var color = d3.scaleOrdinal()
.domain(allGroups)
.range(d3.schemeSet3);
// A linear scale for node size
var size = d3.scaleLinear()
.domain([1,10])
.range([2,10]);
// A linear scale to position the nodes on the X axis
var x = d3.scalePoint()
.range([0, width])
.domain(allNodes)
// In my input data, links are provided between nodes -id-, NOT between node names.
// So I have to do a link between this id and the name
var idToNode = {};
data.nodes.forEach(function (n) {
idToNode[n.id] = n;
});
// Add the links
var links = svg
.selectAll('mylinks')
.data(data.links)
.enter()
.append('path')
.attr('d', function (d) {
start = x(idToNode[d.source].name) // X position of start node on the X axis
end = x(idToNode[d.target].name) // X position of end node
return ['M', start, height-30, // the arc starts at the coordinate x=start, y=height-30 (where the starting node is)
'A', // This means we're gonna build an elliptical arc
(start - end)/2, ',', // Next 2 lines are the coordinates of the inflexion point. Height of this point is proportional with start - end distance
(start - end)/2, 0, 0, ',',
start < end ? 1 : 0, end, ',', height-30] // We always want the arc on top. So if end is before start, putting 0 here turn the arc upside down.
.join(' ');
})
.style("fill", "none")
.attr("stroke", "grey")
.style("stroke-width", 1)
// Add the circle for the nodes
var nodes = svg
.selectAll("mynodes")
.data(data.nodes.sort(function(a,b) { return +b.n - +a.n }))
.enter()
.append("circle")
.attr("cx", function(d){ return(x(d.name))})
.attr("cy", height-30)
.attr("r", function(d){ return(size(d.n))})
.style("fill", function(d){ return color(d.grp)})
.attr("stroke", "white")
// And give them a label
var labels = svg
.selectAll("mylabels")
.data(data.nodes)
.enter()
.append("text")
.attr("x", 0)
.attr("y", 0)
.text(function(d){ return(d.name)} )
.style("text-anchor", "end")
.attr("transform", function(d){ return( "translate(" + (x(d.name)) + "," + (height-15) + ")rotate(-45)")})
.style("font-size", 6)
// Add the highlighting functionality
nodes
.on('mouseover', function (d) {
// Highlight the nodes: every node is grey except him
nodes
.style('opacity', .2)
d3.select(this)
.style('opacity', 1)
// Highlight the connections
links
.style('stroke', function (link_d) { return link_d.source === d.id || link_d.target === d.id ? color(d.grp) : '#b8b8b8';})
.style('stroke-opacity', function (link_d) { return link_d.source === d.id || link_d.target === d.id ? 1 : .2;})
.style('stroke-width', function (link_d) { return link_d.source === d.id || link_d.target === d.id ? 4 : 1;})
labels
.style("font-size", function(label_d){ return label_d.name === d.name ? 16 : 2 } )
.attr("y", function(label_d){ return label_d.name === d.name ? 10 : 0 } )
})
.on('mouseout', function (d) {
nodes.style('opacity', 1)
links
.style('stroke', 'grey')
.style('stroke-opacity', .8)
.style('stroke-width', '1')
labels
.style("font-size", 6 )
})
})
</script>
<!-- ============================ RELATED SECTION ============================ -->
<section class="bg-light" id="portfolio_landing" style="padding-top: 30px; padding-bottom: 30px">
<div class="container">
<p class="mySeryTitle">Related chart types</p>
<hr>
<div class="row">
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="chord.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Chord150.png" alt="">
</a>
<div class="captionPortfolio">Chord diagram</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="network.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Network150.png" alt="">
</a>
<div class="captionPortfolio">Network</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="sankey.html">
<div class="portfolio-hover">
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<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Sankey150.png" alt="">
</a>
<div class="captionPortfolio">Sankey</div>
</div>
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<a class="portfolio-link" href="arc.html">
<div class="portfolio-hover">
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<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Arc150.png" alt="">
</a>
<div class="captionPortfolio">Arc diagram</div>
</div>
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<a class="portfolio-link" href="bundle.html">
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</div>
</div>
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</a>
<div class="captionPortfolio">Edge bundling</div>
</div>
</div>
</div>
</section>
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