Sankey with highlighting and CSV import

.block

license: mit

README.md

Sankey with highlighting and CSV import Incorporates the solution from http://bl.ocks.org/d3noob/c9b90689c1438f57d649 for converting a CSV file with links into the required data format for the Sankey plugin.

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arguments.length?(c=t,v=$c[!c<<1|!l],n):c},n.y=function(t){return arguments.length?(l=t,v=$c[!c<<1|!l],n):l},n.clamp=function(t){return arguments.length?(c&&l?(p=!!t[0],d=!!t[1]):c?p=!!t:l&&(d=!!t),n):c&&l?[p,d]:c?p:l?d:null},n.extent=function(t){var e,r,u,a,f;return arguments.length?(c&&(e=t[0],r=t[1],l&&(e=e[0],r=r[0]),i=[e,r],c.invert&&(e=c(e),r=c(r)),e>r&&(f=e,e=r,r=f),(e!=s[0]||r!=s[1])&&(s=[e,r])),l&&(u=t[0],a=t[1],c&&(u=u[1],a=a[1]),o=[u,a],l.invert&&(u=l(u),a=l(a)),u>a&&(f=u,u=a,a=f),(u!=h[0]||a!=h[1])&&(h=[u,a])),n):(c&&(i?(e=i[0],r=i[1]):(e=s[0],r=s[1],c.invert&&(e=c.invert(e),r=c.invert(r)),e>r&&(f=e,e=r,r=f))),l&&(o?(u=o[0],a=o[1]):(u=h[0],a=h[1],l.invert&&(u=l.invert(u),a=l.invert(a)),u>a&&(f=u,u=a,a=f))),c&&l?[[e,u],[r,a]]:c?[e,r]:l&&[u,a])},n.clear=function(){return n.empty()||(s=[0,0],h=[0,0],i=o=null),n},n.empty=function(){return!!c&&s[0]==s[1]||!!l&&h[0]==h[1]},mo.rebind(n,a,"on")};var Xc={n:"ns-resize",e:"ew-resize",s:"ns-resize",w:"ew-resize",nw:"nwse-resize",ne:"nesw-resize",se:"nwse-resize",sw:"nesw-resize"},$c=[["n","e","s","w","nw","ne","se","sw"],["e","w"],["n","s"],[]],Bc=mo.time={},Wc=Date,Jc=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];zi.prototype={getDate:function(){return this._.getUTCDate()},getDay:function(){return this._.getUTCDay()},getFullYear:function(){return this._.getUTCFullYear()},getHours:function(){return this._.getUTCHours()},getMilliseconds:function(){return this._.getUTCMilliseconds()},getMinutes:function(){return this._.getUTCMinutes()},getMonth:function(){return this._.getUTCMonth()},getSeconds:function(){return this._.getUTCSeconds()},getTime:function(){return this._.getTime()},getTimezoneOffset:function(){return 0},valueOf:function(){return 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n=Bc.day(n),n.setMonth(0,1),n},function(n,t){n.setFullYear(n.getFullYear()+t)},function(n){return n.getFullYear()}),Bc.years=Bc.year.range,Bc.years.utc=Bc.year.utc.range,Bc.day=Ci(function(n){var t=new Wc(2e3,0);return t.setFullYear(n.getFullYear(),n.getMonth(),n.getDate()),t},function(n,t){n.setDate(n.getDate()+t)},function(n){return n.getDate()-1}),Bc.days=Bc.day.range,Bc.days.utc=Bc.day.utc.range,Bc.dayOfYear=function(n){var t=Bc.year(n);return Math.floor((n-t-6e4*(n.getTimezoneOffset()-t.getTimezoneOffset()))/864e5)},Jc.forEach(function(n,t){n=n.toLowerCase(),t=7-t;var e=Bc[n]=Ci(function(n){return(n=Bc.day(n)).setDate(n.getDate()-(n.getDay()+t)%7),n},function(n,t){n.setDate(n.getDate()+7*Math.floor(t))},function(n){var e=Bc.year(n).getDay();return Math.floor((Bc.dayOfYear(n)+(e+t)%7)/7)-(e!==t)});Bc[n+"s"]=e.range,Bc[n+"s"].utc=e.utc.range,Bc[n+"OfYear"]=function(n){var e=Bc.year(n).getDay();return Math.floor((Bc.dayOfYear(n)+(e+t)%7)/7)}}),Bc.week=Bc.sunday,Bc.weeks=Bc.sunday.range,Bc.weeks.utc=Bc.sunday.utc.range,Bc.weekOfYear=Bc.sundayOfYear,Bc.format=ji;var il=Hi(tl),ol=Fi(tl),al=Hi(el),cl=Fi(el),ll=Hi(rl),sl=Fi(rl),fl=Hi(ul),hl=Fi(ul),gl=/^%/,pl={"-":"",_:" ",0:"0"},dl={a:function(n){return el[n.getDay()]},A:function(n){return tl[n.getDay()]},b:function(n){return ul[n.getMonth()]},B:function(n){return rl[n.getMonth()]},c:ji(Kc),d:function(n,t){return Pi(n.getDate(),t,2)},e:function(n,t){return Pi(n.getDate(),t,2)},H:function(n,t){return Pi(n.getHours(),t,2)},I:function(n,t){return Pi(n.getHours()%12||12,t,2)},j:function(n,t){return Pi(1+Bc.dayOfYear(n),t,3)},L:function(n,t){return Pi(n.getMilliseconds(),t,3)},m:function(n,t){return Pi(n.getMonth()+1,t,2)},M:function(n,t){return Pi(n.getMinutes(),t,2)},p:function(n){return n.getHours()>=12?"PM":"AM"},S:function(n,t){return Pi(n.getSeconds(),t,2)},U:function(n,t){return Pi(Bc.sundayOfYear(n),t,2)},w:function(n){return n.getDay()},W:function(n,t){return Pi(Bc.mondayOfYear(n),t,2)},x:ji(Qc),X:ji(nl),y:function(n,t){return Pi(n.getFullYear()%100,t,2)},Y:function(n,t){return Pi(n.getFullYear()%1e4,t,4)},Z:ao,"%":function(){return"%"}},vl={a:Oi,A:Ri,b:Zi,B:Vi,c:Xi,d:no,e:no,H:eo,I:eo,j:to,L:io,m:Qi,M:ro,p:oo,S:uo,U:Ii,w:Yi,W:Ui,x:$i,X:Bi,y:Ji,Y:Wi,Z:Gi,"%":co},ml=/^\s*\d+/,yl=mo.map({am:0,pm:1});ji.utc=lo;var Ml=lo("%Y-%m-%dT%H:%M:%S.%LZ");ji.iso=Date.prototype.toISOString&&+new Date("2000-01-01T00:00:00.000Z")?so:Ml,so.parse=function(n){var t=new Date(n);return isNaN(t)?null:t},so.toString=Ml.toString,Bc.second=Ci(function(n){return new Wc(1e3*Math.floor(n/1e3))},function(n,t){n.setTime(n.getTime()+1e3*Math.floor(t))},function(n){return n.getSeconds()}),Bc.seconds=Bc.second.range,Bc.seconds.utc=Bc.second.utc.range,Bc.minute=Ci(function(n){return new Wc(6e4*Math.floor(n/6e4))},function(n,t){n.setTime(n.getTime()+6e4*Math.floor(t))},function(n){return n.getMinutes()}),Bc.minutes=Bc.minute.range,Bc.minutes.utc=Bc.minute.utc.range,Bc.hour=Ci(function(n){var t=n.getTimezoneOffset()/60;return new Wc(36e5*(Math.floor(n/36e5-t)+t))},function(n,t){n.setTime(n.getTime()+36e5*Math.floor(t))},function(n){return n.getHours()}),Bc.hours=Bc.hour.range,Bc.hours.utc=Bc.hour.utc.range,Bc.month=Ci(function(n){return n=Bc.day(n),n.setDate(1),n},function(n,t){n.setMonth(n.getMonth()+t)},function(n){return n.getMonth()}),Bc.months=Bc.month.range,Bc.months.utc=Bc.month.utc.range;var xl=[1e3,5e3,15e3,3e4,6e4,3e5,9e5,18e5,36e5,108e5,216e5,432e5,864e5,1728e5,6048e5,2592e6,7776e6,31536e6],bl=[[Bc.second,1],[Bc.second,5],[Bc.second,15],[Bc.second,30],[Bc.minute,1],[Bc.minute,5],[Bc.minute,15],[Bc.minute,30],[Bc.hour,1],[Bc.hour,3],[Bc.hour,6],[Bc.hour,12],[Bc.day,1],[Bc.day,2],[Bc.week,1],[Bc.month,1],[Bc.month,3],[Bc.year,1]],_l=[[ji("%Y"),Vt],[ji("%B"),function(n){return n.getMonth()}],[ji("%b %d"),function(n){return 1!=n.getDate()}],[ji("%a %d"),function(n){return n.getDay()&&1!=n.getDate()}],[ji("%I %p"),function(n){return n.getHours()}],[ji("%I:%M"),function(n){return n.getMinutes()}],[ji(":%S"),function(n){return n.getSeconds()}],[ji(".%L"),function(n){return n.getMilliseconds()}]],wl=go(_l);bl.year=Bc.year,Bc.scale=function(){return fo(mo.scale.linear(),bl,wl)};var Sl={range:function(n,t,e){return mo.range(+n,+t,e).map(ho)}},El=bl.map(function(n){return[n[0].utc,n[1]]}),kl=[[lo("%Y"),Vt],[lo("%B"),function(n){return n.getUTCMonth()}],[lo("%b %d"),function(n){return 1!=n.getUTCDate()}],[lo("%a %d"),function(n){return n.getUTCDay()&&1!=n.getUTCDate()}],[lo("%I %p"),function(n){return n.getUTCHours()}],[lo("%I:%M"),function(n){return n.getUTCMinutes()}],[lo(":%S"),function(n){return n.getUTCSeconds()}],[lo(".%L"),function(n){return n.getUTCMilliseconds()}]],Al=go(kl);return El.year=Bc.year.utc,Bc.scale.utc=function(){return fo(mo.scale.linear(),El,Al)},mo.text=vt(function(n){return n.responseText}),mo.json=function(n,t){return mt(n,"application/json",po,t)},mo.html=function(n,t){return mt(n,"text/html",vo,t)},mo.xml=vt(function(n){return n.responseXML}),mo}();

index.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Result 10 Programme</title>
<link href="sankey_style.css" rel="stylesheet">
<style media="screen" type="text/css">

.sankey-graph {
  height: 600px;
}

.sankey-graph .node rect {
  shape-rendering: crispEdges;
  pointer-events:all;
  fill: none;
  stroke: grey;
  stroke-width: 2px;
}

.sankey-graph .nodeInfo {
  pointer-events:none;
  background-color: white;
  font: 9px;
  font-family: Calibri, sans-serif; 
}

.sankey-graph #foreignObject {
  pointer-events:none;
}

.sankey-graph .node text {
  pointer-events: none;
  text-shadow: 0 1px 0 #fff;
}

.sankey-graph .bar rect {
  stroke: none;
}

.sankey-graph .link {
  fill: none;
  stroke: #000;
  stroke-opacity: .2;
}

.sankey-graph div.nodeInfo {
  text-align: center;
  line-height: 110%;
  vertical-align: middle; 
  display: table-cell; 
}


</style>
<body>

<header>
</header>

<p id="chart" class="sankey-graph">

<script src="d3.min.js"></script>
<script src="sankey-bm.js"></script>
<script>

var margin = {top: 1, right: 0, bottom: 6, left: 0},
    width = 1250,  //also change CSS file to change Width
    height = 600 - margin.top - margin.bottom,
    node_Width = 110;
    node_Stroke = 2;

var formatNumber = d3.format(",.0f"),
    format = function(d) { return formatNumber(d) + " TODO TODO TODO"; },
    color = d3.scale.category20();

var svg = d3.select("#chart").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 + ")");

var sankey = d3.sankey()
    .nodeWidth(node_Width)       //Node width
    .nodePadding(15)              //spacing between nodes
    .size([width, height]);

var path = sankey.link();

 d3.csv("programme2.csv", function(error, data) {
 
 // start of CSV conversion
 
 console.log(data);
 
 //set up graph in same style as original example but empty
  var graph = {"nodes" : [], "links" : []};

    data.forEach(function (d) {
      graph.nodes.push({ "name": d.source });
      graph.nodes.push({ "name": d.target });
      graph.links.push({ "source": d.source,
                         "target": d.target,
                         "value": +d.value });
     });

     // return only the distinct / unique nodes
     graph.nodes = d3.keys(d3.nest()
       .key(function (d) { return d.name; })
       .map(graph.nodes));

     // loop through each link replacing the text with its index from node
     graph.links.forEach(function (d, i) {
       graph.links[i].source = graph.nodes.indexOf(graph.links[i].source);
       graph.links[i].target = graph.nodes.indexOf(graph.links[i].target);
     });

     //now loop through each nodes to make nodes an array of objects
     // rather than an array of strings
     graph.nodes.forEach(function (d, i) {
       graph.nodes[i] = { "name": d };
     });
 
	console.log(graph);
 
 
 
 // end of CSV conversion
 

  sankey.nodes(graph.nodes)
      .links(graph.links)
      .layout(100);        //iterations for layout algorithm
	 
		
  var link = svg.append("g").selectAll(".link")
      .data(graph.links)
    .enter().append("path")
      .attr("class", "link")
      .attr("d", path)
      .style("stroke-width", function(d) { return Math.max(1, d.dy); })
      .sort(function(a, b) { return b.dy - a.dy; });
      //.on("mouseover", highlightLink)
      //.on("mouseout", unhighlightLink);

  var node = svg.append("g").selectAll(".node")
      .data(graph.nodes)
    .enter().append("g")
      .attr("class", "node")
      .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
	      .call(d3.behavior.drag()
      .origin(function(d) { return d; })
      .on("dragstart", function() { this.parentNode.appendChild(this); })
      .on("drag", dragmove));
	  

  node.append("foreignObject")
        .attr("y", 0)
        .attr("height", function(d) { return d.dy; })
        .attr("width", sankey.nodeWidth())
        .attr("transform", null)
      .append("xhtml:div")
        .attr("class", "nodeInfo")
        .html(function(d) {
          //var types = d['types'];
          //var properName = '';
          //var typeNames = '';
          

          var htmlString = d.name;
          return htmlString;
        }) 
        .style("height", function(d) { return d.dy + "px"; })
        .style("width", sankey.nodeWidth() + "px");

//Add node clicking
d3.selectAll(".node").on("click", handleNodeClick);

  /*Adding color bar for Node TYPE:
  var typeDict = {
    'cdn': '#00778c',
    'analytics': '#ff9b03',
    'security': '#58008c',
    'advertising': '#506da5',
    'api': '#11462c',
    'social': '#ef5f00',
    'tracking': '#58008c',
    'datacenter': '#11462c',
    'hosting': '#a5c1b3',
    'cloud': '#11462c'
  }; */ 

  /*node.append("g")
      .attr("class", "bar")
    .call(addTypeBars); */

   /*  function addTypeBars(sel) {

    sel.each(function(d) {

    var bars = d3.select(this);
      var types = d.types;

      if (types) {

          var colorbars = [];
          //Loop through to pull the colors this set of types does have
          for(var j = 0; j < types.length; j++) {
              if (typeDict[types[j]]) {
                  colorbars.push(types[j]);
              }
          }

          for (var i = 0; i < colorbars.length; i++) {
              bars.append("rect")
              .attr("x", i * (sankey.nodeWidth()/colorbars.length) + 1)
              .attr("y", 1)
              .attr("height", 2.5) 
              .attr("width", function (d) { 
                if (i == colorbars.length - 1) 
                  return (sankey.nodeWidth()/colorbars.length) - 2;
                else
                  return (sankey.nodeWidth()/colorbars.length);

              })
              .style("fill", function(d) { 
                  return typeDict[colorbars[i]]
              });

          }
      }

    })
  }//end of addTypeBars  */

  node.append("rect")
    .attr("height", function(d) { return d.dy; }) 
    .attr("width", sankey.nodeWidth())
    .on("mouseover", showConnections)
    .on("mouseout", hideConnections);

  function showConnections(d) {
      //this highlights the node
      d3.select(this).style("stroke","black")
          .style("stroke-opacity", 0.6);
      //If this link is connected to the node
      link.style("stroke-opacity", function(l) {
          if (l.source.name == d.name || l.target.name == d.name) {
              return 0.6;
          }
          else 
              return 0.2;
      });
  }

  function hideConnections(d) {
      //This unhighlights the node
      d3.select(this).style("stroke","grey")
          .style("stroke-opacity", 0.6);
      link.style("stroke-opacity", 0.2);
  }

  function highlightLink(d) {
      //changes styling on selected link
      d3.select(this).style("stroke","red")
          .style("stroke-opacity", 0.6);
  }

  function unhighlightLink(d) {
      //changes styling on selected link
      d3.select(this).style("stroke","black")
          .style("stroke-opacity", 0.2);
  }    

  function toTitleCase(str) {
      return str.replace(/\w\S*/g, function(txt){
        return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
      });
  }

  function rgbToHex(r, g, b) {
    var rgb = b | (g << 8) | (r << 16);
    return (0x1000000 | rgb).toString(16).substring(1);
  }

  //Recursive highlighting of nodes
  //---------------------------
  
	var leftDelay;
	var rightDelay;
	var delayIncrement
	var durationTime;
	
	delayIncrement = 75;
	durationTime = 400; //millisecs
  
	function handleNodeClick(d) {
	
	leftDelay = 0;
	rightDelay = 0;
	
	//Reset colour of nodes to black	
	d3.selectAll(".node")
		.transition()
		.duration(250)
		.style("color","black");
	
	d3.selectAll(".link")
		.transition()
		.duration(250)
		.style("stroke","black");
	
	//Highlight clicked node	
	d3.selectAll(".node").filter(function(d2,i) {	
		return d.name == d2.name;
	})
	.style("color","green")

    iterateLinkedLinksRight(d); //Recurse source direction
	iterateLinkedLinksLeft(d); //Recurse target direction
  }
  function iterateLinkedLinksRight(pStartNode) {

	rightDelay = rightDelay + delayIncrement;
  
	//Select links that have a given source name
	d3.selectAll("path.link").filter(function(pLinkedLink,i) {
		return pLinkedLink.source.name == pStartNode.name;
	})
	.transition()
	.duration(durationTime)
	.delay(rightDelay)
	.style("stroke","red")
	.style("stroke-opacity", 0.6)
	.each(iterateLinkedNodesRight);
  }
  function iterateLinkedNodesRight(pStartLink) {
	//Select nodes that have a given source name
	d3.selectAll(".node").filter(function(pLinkedNode,i) {	
		return pLinkedNode.name == pStartLink.target.name;
	})
	.transition()
	.duration(durationTime)
	.delay(rightDelay)
	.style("color","red")
	.each(iterateLinkedLinksRight);
	
	rightDelay = 0;
  }

  function iterateLinkedLinksLeft(pStartNode) {

	leftDelay = leftDelay + delayIncrement;
	
	//Select links that have a given source name
	d3.selectAll("path.link").filter(function(pLinkedLink,i) {
		return pLinkedLink.target.name == pStartNode.name;
	})
	.transition()
	.duration(durationTime)
	.delay(leftDelay)
	.style("stroke","red")
	.style("stroke-opacity", 0.6)
	.each(iterateLinkedNodesLeft);
  }
  function iterateLinkedNodesLeft(pStartLink) {

	//Select nodes that have a given source name
	d3.selectAll(".node").filter(function(pLinkedNode,i) {	
		return pLinkedNode.name == pStartLink.source.name;
	})
	.transition()
	.duration(durationTime)
	.delay(leftDelay)
	.style("color","red")
	.each(iterateLinkedLinksLeft);
	
	leftDelay = 0;
  }
  
   /* function dragmove(d) {
    d3.select(this).attr("transform", "translate(" + d.x + "," + (d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))) + ")");
    sankey.relayout();
    link.attr("d", path);
  } */

   function dragmove(d) {
    d3.select(this).attr("transform", 
        "translate(" + (
        	   d.x = Math.max(0, Math.min(width - d.dx, d3.event.x))
        	) + "," + (
                   d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))
            ) + ")");
    sankey.relayout();
    link.attr("d", path);
  }
  
  //---------------------------
});

</script>

programme2.csv

sankey-bm.js

d3.sankey = function() {
  var sankey = {},
      nodeWidth = 24,
      nodePadding = 8,
      size = [1, 1],
      nodes = [],
      links = []
	  //heightConstant = 80;

  sankey.nodeWidth = function(_) {
    if (!arguments.length) return nodeWidth;
    nodeWidth = +_;
    return sankey;
  };

  sankey.nodePadding = function(_) {
    if (!arguments.length) return nodePadding;
    nodePadding = +_;
    return sankey;
  };

  sankey.nodes = function(_) {
    if (!arguments.length) return nodes;
    nodes = _;
    return sankey;
  };

  sankey.links = function(_) {
    if (!arguments.length) return links;
    links = _;
    return sankey;
  };

  sankey.size = function(_) {
    if (!arguments.length) return size;
    size = _;
    return sankey;
  };

  sankey.layout = function(iterations) {
    computeNodeLinks();
    computeNodeValues();
    computeNodeBreadths();
    computeNodeDepths(iterations);
    computeLinkDepths();
    return sankey;
  };

  sankey.relayout = function() {
    computeLinkDepths();
    return sankey;
  };

  sankey.link = function() {
    var curvature = .5;

    function link(d) {
      var x0 = d.source.x + d.source.dx,
          x1 = d.target.x,
          xi = d3.interpolateNumber(x0, x1),
          x2 = xi(curvature),
          x3 = xi(1 - curvature),
          // y0 = d.source.y + d.sy + d.dy / 2,
          // y1 = d.target.y + d.ty + d.dy / 2;
		  y0 = d.source.y + d.source.dy / 2,
          y1 = d.target.y + d.target.dy / 2;
      return "M" + x0 + "," + y0
           + "C" + x2 + "," + y0
           + " " + x3 + "," + y1
           + " " + x1 + "," + y1;
    }

    link.curvature = function(_) {
      if (!arguments.length) return curvature;
      curvature = +_;
      return link;
    };

    return link;
  };

  // Populate the sourceLinks and targetLinks for each node.
  // Also, if the source and target are not objects, assume they are indices.
  function computeNodeLinks() {
    nodes.forEach(function(node) {
      node.sourceLinks = [];
      node.targetLinks = [];
    });
    links.forEach(function(link) {
      var source = link.source,
          target = link.target;
      if (typeof source === "number") source = link.source = nodes[link.source];
      if (typeof target === "number") target = link.target = nodes[link.target];
      source.sourceLinks.push(link);
      target.targetLinks.push(link);
    });
  }

  // Compute the value (size) of each node by summing the associated links.
  function computeNodeValues() {
    nodes.forEach(function(node) {
      node.value = Math.max(
        d3.sum(node.sourceLinks, value),
        d3.sum(node.targetLinks, value)
      );
    });
  }

  // Iteratively assign the breadth (x-position) for each node.
  // Nodes are assigned the maximum breadth of incoming neighbors plus one;
  // nodes with no incoming links are assigned breadth zero, while
  // nodes with no outgoing links are assigned the maximum breadth.
  function computeNodeBreadths() {
    var remainingNodes = nodes,
        nextNodes,
        x = 0;

    while (remainingNodes.length) {
      nextNodes = [];
      remainingNodes.forEach(function(node) {
        node.x = x;
        node.dx = nodeWidth;
        node.sourceLinks.forEach(function(link) {
          nextNodes.push(link.target);
        });
      });
      remainingNodes = nextNodes;
      ++x;
    }

    //
    moveSinksRight(x);
    scaleNodeBreadths((width - nodeWidth) / (x - 1));
  }

  function moveSourcesRight() {
    nodes.forEach(function(node) {
      if (!node.targetLinks.length) {
        node.x = d3.min(node.sourceLinks, function(d) { return d.target.x; }) - 1;
      }
    });
  }

  function moveSinksRight(x) {
    nodes.forEach(function(node) {
      if (!node.sourceLinks.length) {
        node.x = x - 1;
      }
    });
  }

  function scaleNodeBreadths(kx) {
    nodes.forEach(function(node) {
      node.x *= kx;
    });
  }

  function computeNodeDepths(iterations) {
    var nodesByBreadth = d3.nest()
        .key(function(d) { return d.x; })
        .sortKeys(d3.ascending)
        .entries(nodes)
        .map(function(d) { return d.values; });

    //
    initializeNodeDepth();
    resolveCollisions();
    for (var alpha = 1; iterations > 0; --iterations) {
      relaxRightToLeft(alpha *= .99);
      resolveCollisions();
      relaxLeftToRight(alpha);
      resolveCollisions();
    }

    function initializeNodeDepth() {
      var ky = d3.min(nodesByBreadth, function(nodes) {
        return (size[1] - (nodes.length - 1) * nodePadding) / d3.sum(nodes, value);
      });

      nodesByBreadth.forEach(function(nodes) {
        nodes.forEach(function(node, i) {
          node.y = i;
          // node.dy = node.value * ky;
		  
		  node.dy = setNodeHeight(node);
        });
      });

      links.forEach(function(link) {
        link.dy = link.value * ky;
      });
    }
	
	
	function setNodeHeight(node) {
	
		var actualHeight = (node.name.length / node.dx);
		var setHeight;
		if (actualHeight < 0.2249) { setHeight = 13; }
		else if (actualHeight < 0.41) { setHeight = 26; }
		else if (actualHeight < 0.551) { setHeight = 39; }
		else if (actualHeight < 0.71) { setHeight = 52; }
		
		return setHeight;
	}

    function relaxLeftToRight(alpha) {
      nodesByBreadth.forEach(function(nodes, breadth) {
        nodes.forEach(function(node) {
          if (node.targetLinks.length) {
            var y = d3.sum(node.targetLinks, weightedSource) / d3.sum(node.targetLinks, value);
            node.y += (y - center(node)) * alpha;
          }
        });
      });

      function weightedSource(link) {
        return center(link.source) * link.value;
      }
    }

    function relaxRightToLeft(alpha) {
      nodesByBreadth.slice().reverse().forEach(function(nodes) {
        nodes.forEach(function(node) {
          if (node.sourceLinks.length) {
            var y = d3.sum(node.sourceLinks, weightedTarget) / d3.sum(node.sourceLinks, value);
            node.y += (y - center(node)) * alpha;
          }
        });
      });

      function weightedTarget(link) {
        return center(link.target) * link.value;
      }
    }

    function resolveCollisions() {
      nodesByBreadth.forEach(function(nodes) {
        var node,
            dy,
            y0 = 0,
            n = nodes.length,
            i;

        // Push any overlapping nodes down.
        nodes.sort(ascendingDepth);
        for (i = 0; i < n; ++i) {
          node = nodes[i];
          dy = y0 - node.y;
          if (dy > 0) node.y += dy;
          y0 = node.y + node.dy + nodePadding;
        }

        // If the bottommost node goes outside the bounds, push it back up.
        dy = y0 - nodePadding - size[1];
        if (dy > 0) {
          y0 = node.y -= dy;

          // Push any overlapping nodes back up.
          for (i = n - 2; i >= 0; --i) {
            node = nodes[i];
            dy = node.y + node.dy + nodePadding - y0;
            if (dy > 0) node.y -= dy;
            y0 = node.y;
          }
        }
      });
    }

    function ascendingDepth(a, b) {
      return a.y - b.y;
    }
  }

  function computeLinkDepths() {
    nodes.forEach(function(node) {
      node.sourceLinks.sort(ascendingTargetDepth);
      node.targetLinks.sort(ascendingSourceDepth);
    });
    nodes.forEach(function(node) {
      var sy = 0, ty = 0;
      node.sourceLinks.forEach(function(link) {
        link.sy = sy;
        sy += link.dy;
      });
      node.targetLinks.forEach(function(link) {
        link.ty = ty;
        ty += link.dy;
      });
    });

    function ascendingSourceDepth(a, b) {
      return a.source.y - b.source.y;
    }

    function ascendingTargetDepth(a, b) {
      return a.target.y - b.target.y;
    }
  }

  function center(node) {
    return node.y + node.dy / 2;
  }

  function value(link) {
    return link.value;
  }

  return sankey;
};

sankey_style.css

html {
  min-width: 1040px;
}

body {
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  position: relative;
  width: 1250px;
}

h1 {
  font-size: 32px;
  font-weight: 250;
  letter-spacing: -2px;
  margin: .3em 0 .1em 0;
}

h2 {
  margin-top: 2em;
}

h1, h2 {
  text-rendering: optimizeLegibility;
}

h2 a {
  color: #ccc;
  left: -20px;
  position: absolute;
  width: 740px;
}

footer {
  font-size: small;
  margin-top: 8em;
}

header aside {
  margin-top: 88px;
}

header aside,
footer aside {
  color: #636363;
  text-align: right;
}

aside {
  font-size: small;
  right: 0;
  position: absolute;
  width: 180px;
}

.attribution {
  font-size: small;
  margin-bottom: 2em;
}

body > p, li > p {
  line-height: 1.5em;
}

body > p {
  width: 720px;
}

body > blockquote {
  width: 640px;
}

li {
  width: 680px;
}

a {
  color: steelblue;
}

a:not(:hover) {
  text-decoration: none;
}

pre, code, textarea {
  font-family: "Menlo", monospace;
}

code {
  line-height: 1em;
}

textarea {
  font-size: 100%;
}

body > pre {
  border-left: solid 2px #ccc;
  padding-left: 18px;
  
}

.html .value,
.javascript .string,
.javascript .regexp {
  color: #756bb1;
}

.html .tag,
.css .tag,
.javascript .keyword {
  color: #3182bd;
}

.comment {
  color: #636363;
}

.html .doctype,
.javascript .number {
  color: #31a354;
}

.html .attribute,
.css .attribute,
.javascript .class,
.javascript .special {
  color: #e6550d;
}

svg {
  font: 11px sans-serif;
}

.axis path, .axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

sup, sub {
  line-height: 0;
}

q:before,
blockquote:before {
  content: "“";
}

q:after,
blockquote:after {
  content: "”";
}

blockquote:before {
  position: absolute;
  left: 2em;
}

blockquote:after {
  position: absolute;
}