Ch. 6, Fig. 4 - D3.js in Action

This is the code for Chapter 6, Figure 4 from D3.js in Action showing how to create a simple adjacency matrix from node and edge list formatted data.

forked from emeeks's block: Ch. 6, Fig. 4 - D3.js in Action

<html>
<head>
  <title>D3 in Action Chapter 6 - Example 1</title>
  <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>
</head>
<style>
  svg {
    height: 500px;
    width: 500px;
    border: 1px solid gray;
  }

</style>
<body>

<div id="viz">
  <svg>
  </svg>
</div>
<div id="controls" />
</body>
  <footer>
    
<script>
    queue()
    .defer(d3.csv, "nodelist.csv")
    .defer(d3.csv, "edgelist.csv")
    .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);
        }
      }
      
      d3.select("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", "red")
      .style("fill-opacity", function (d) {return d.weight * .2})
      .on("mouseover", gridOver)
      
      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.select("#adjacencyG").append("g").call(xAxis).selectAll("text").style("text-anchor", "end").attr("transform", "translate(-10,-10) rotate(90)");
      d3.select("#adjacencyG").append("g").call(yAxis);
      
      function gridOver(d,i) {
        d3.selectAll("rect").style("stroke-width", function (p) {return p.x == d.x || p.y == d.y ? "3px" : "1px"})
      }

}
</script>
  </footer>

</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js

https://d3js.org/queue.v1.min.js