D3 Examples - adjacency

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <script src="https://d3js.org/queue.v1.min.js" type="text/javascript"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width:100%; height: 100% }
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  </style>
</head>
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<body onload="adjacency()">
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<div>
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<div id="vizcontainer" style="float:left">
<svg style="width:400px;height:400px;border:1px lightgray solid;" />
</div>
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<div id="vizcontainer1" style="float:left">
<svg style="width:400px;height:400px;border:1px lightgray solid;" />
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</div>
</div>  
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<script>
  
  function adjacency() {
​
    queue()
    .defer(d3.csv, "nodelist.txt")
    .defer(d3.csv, "edgelist.txt")
    .await(function(error, file1, file2) { createAdjacencyMatrix(file1, file2); });
    
    function createAdjacencyMatrix(nodes,edges) {
      var edgeHash = {};
      for (x in edges) {
        var id = edges[x].source + "-" + edges[x].target;
        edgeHash[id] = edges[x];
      }
      matrix = [];
      //create all possible edges
      for (a in nodes) {
        for (b in nodes) {
          var grid = {id: nodes[a].id + "-" + nodes[b].id, x: b, y: a, weight: 0};
          if (edgeHash[grid.id]) {
            grid.weight = edgeHash[grid.id].weight;
          }
          matrix.push(grid);
        }
      }
​
      var weightScale = d3.scale.linear()
        .domain(d3.extent(function(d){ return d.weight }))
        .range([0,1])
​
      
   // fill matrix   
      d3.selectAll("svg")
      .append("g")
      .attr("transform", "translate(50,50)")
      .attr("id", "adjacencyG")
      .selectAll("rect")
      .data(matrix)
      .enter()
      .append("rect")
      .attr("width", 25)
      .attr("height", 25)
      .attr("x", function (d) {return d.x * 25})
      .attr("y", function (d) {return d.y * 25})
      .style("stroke", "black")
      .style("stroke-width", "1px")
      .style("fill", "#ff1414")
      .style("fill-opacity", function (d) {return d.weight*0.1; })
      .on("mouseover", gridOver)
;
   
   // add values   
      d3.selectAll("svg")
      .append("g")
      .attr("transform", "translate(50,50)")
      .attr("id", "adjacencyG")
      .selectAll("rect")
      .data(matrix)
      .enter()
      .append("text")
     .attr("x", function (d) {return (d.x * 25)+12.5})
     .attr("y", function (d) {return (d.y * 25)+12.5})
       .attr("font-family", "sans-serif")
      .attr("font-size", "11px")
      .attr("fill", "black")
     .attr("text-anchor","middle")
     .attr("dy", ".35em")
     .text(function(d){ return d.weight;})
       ;
      
​
     
​
      var scaleSize = nodes.length * 25;
      var nameScale = d3.scale.ordinal().domain(nodes.map(function (el) {return el.id})).rangePoints([0,scaleSize],1);
​
      xAxis = d3.svg.axis()
        .scale(nameScale)
        .orient("top")
        .tickSize(4);
​
      yAxis = d3.svg.axis().scale(nameScale).orient("left").tickSize(4);    
      
      d3.selectAll("#adjacencyG").append("g")
        .call(xAxis)
      .selectAll("text")
        .style("text-anchor", "end")
        .attr("transform", "translate(-10,-10) rotate(90)");
​
      d3.selectAll("#adjacencyG").append("g")
        .call(yAxis);
 
// cell and it's transpose      
      function gridOver(d,i) {
        d3.selectAll("rect")
         .style("stroke-width", function (p) {return (p.x == d.y && p.y == d.x) || (p.y == d.y && p.x == d.x) ? "3.5px" : "1px"})
      }
    }   
  }
  
  </script>
​
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</body>
</html>
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