D3 Examples - Mosaic Plot Example

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>NYC Crime Density per Capita by Borough</title>
    <style>
​
body {
  font: 10px sans-serif;
}
​
rect {
  stroke: #000;
}
​
svg {
  shape-rendering: crispEdges;
}
​
</style>
    <script src="https://d3js.org/d3.v4.min.js">  </script>
​
  </head>
  <body>
​
    <h2> Please choose the year below to view the mosaic distribution of crime population density</h2>
​
    <input  id="2010" type="radio" name="stack" value="north">2010 <br>
    <input  id="2016"  type="radio" name="stack" value="east" >2016 <br>
    
  <em> Hover over the blocks to view the details </em>
<!-- 
  <em> hober over the blocks to view the details </em>
 <h2 id="2010">2010</h2> <div id="2016">2016</div> -->
​
    <script type="text/javascript">
​
​
var width = 850,
    height = 550,
    margin = 70;
 
var x = d3.scaleLinear()
    .range([0, width - 3 * margin]);
​
var y = d3.scaleLinear()
     .range([0, height - 2 * margin]);
​
// var y = d3.scaleBand()
//       .domain(["FELONY","MISDEMEANOR","VIOLATION")
//     .range([0, height - 2 * margin]);
​
var z = d3.scaleOrdinal(d3.schemeCategory10);
​
console.log(z);
​
var n = d3.format(",d"),
    p = d3.format("%");
​
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
  .append("g")
    .attr("transform", "translate(" + 2 * margin + "," + margin + ")");
​
    //var pathlnk= "mosaicdata.json";
   var pathlnk="2010.json"
  
​
    d3.select("[id='2016']").on("click", function () {
​
    pathlnk="2016.json";
    //alert("6");
​
​
d3.json(pathlnk, function(error, data) {
  if (error) throw error;
​
  var offset = 0;
​
  d3.select("svg").remove(); 
var svg = d3.select("body").append("svg").attr("width","960").attr("height", "600"),
inner = svg.append("g").attr("transform", "translate(" + 2 * margin + "," + margin + ")");
​
  // Nest values by Level. We assume each Level+Boro is unique.
  var Levels = d3.nest()
      .key(function(d) { return d.Level; })
      .entries(data);
​
  // Compute the total sum, the per-Level sum, and the per-Boro offset.
  // You can use reduce rather than reduceRight to reverse the ordering.
  // We also record a reference to the parent Level for each Boro.
  var sum = Levels.reduce(function(v, p) {
    return (p.offset = v) + (p.sum = p.values.reduceRight(function(v, d) {
      d.parent = p;
      return (d.offset = v) + d.value;
    }, 0));
  }, 0);
​
  // Add x-axis ticks.
  var xtick = svg.selectAll(".x")
      //.data(x.ticks(10))
    .enter().append("g")
      .attr("class", "x")
      .attr("transform", function(d) { return "translate(" + x(d) + "," + y(1) + ")"; });
​
  xtick.append("line")
      .attr("y2", 6)
      .style("stroke", "#000");
​
  xtick.append("text")
      .attr("y", 8)
      .attr("text-anchor", "middle")
      .attr("dy", ".71em")
      .text(p);
​
  // Add y-axis ticks.
  var ytick = svg.selectAll(".y")
      //.data(y.ticks(10))
    .enter().append("g")
      .attr("class", "y")
      .attr("transform", function(d) { return "translate(0," + y(1 - d) + ")"; });
​
  ytick.append("line")
      .attr("x1", -6)
      .style("stroke", "#000");
​
  ytick.append("text")
      .attr("x", -8)
      .attr("text-anchor", "end")
      .attr("dy", ".35em")
      .text(p);
​
  // Add a group for each Level.
  var Levels = svg.selectAll(".Level")
      .data(Levels)
    .enter().append("g")
      .attr("class", "Level")
      .attr("xlink:title", function(d) { return d.key; })
      .attr("transform", function(d) { return "translate(" + x(d.offset / sum) + ")"; });
​
  // Add a rect for each Boro.
  var Boros = Levels.selectAll(".Boro")
      .data(function(d) { return d.values; })
    .enter().append("a")
      .attr("class", "Boro")
      .attr("xlink:title", function(d) { return d.Boro + " " + d.parent.key + ": " + n(d.value*100)+"%"; })
    .append("rect")
      .attr("y", function(d) { return y(d.offset / d.parent.sum); })
      .attr("height", function(d) { return y(d.value / d.parent.sum); })
      .attr("width", function(d) { return x(d.parent.sum / sum); })
      .style("fill", function(d) { return z(d.Boro); });
​
       //Boros.exit().remove();
});
​
    });
​
     d3.select("[id='2010']").on("click", function () {
​
    pathlnk="2010.json";
    alert(0);
​
​
d3.json(pathlnk, function(error, data) {
  if (error) throw error;
​
  var offset = 0;
​
d3.select("svg").remove(); 
var svg = d3.select("body").append("svg").attr("width","960").attr("height", "600"),
inner = svg.append("g");
​
  // Nest values by Level. We assume each Level+Boro is unique.
  var Levels = d3.nest()
      .key(function(d) { return d.Level; })
      .entries(data);
​
  // Compute the total sum, the per-Level sum, and the per-Boro offset.
  // You can use reduce rather than reduceRight to reverse the ordering.
  // We also record a reference to the parent Level for each Boro.
  var sum = Levels.reduce(function(v, p) {
    return (p.offset = v) + (p.sum = p.values.reduceRight(function(v, d) {
      d.parent = p;
      return (d.offset = v) + d.value;
    }, 0));
  }, 0);
​
  // Add x-axis ticks.
  var xtick = svg.selectAll(".x")
      //.data(x.ticks(10))
    .enter().append("g")
      .attr("class", "x")
      .attr("transform", function(d) { return "translate(" + x(d) + "," + y(1) + ")"; });
​
  xtick.append("line")
      .attr("y2", 6)
      .style("stroke", "#000");
​
  xtick.append("text")
      .attr("y", 8)
      .attr("text-anchor", "middle")
      .attr("dy", ".71em")
      .text(p);
​
  // Add y-axis ticks.
  var ytick = svg.selectAll(".y")
     // .data(y.ticks(10))
    .enter().append("g")
      .attr("class", "y")
      .attr("transform", function(d) { return "translate(0," + y(1 - d) + ")"; });
​
  ytick.append("line")
      .attr("x1", -6)
      .style("stroke", "#000");
​
  ytick.append("text")
      .attr("x", -8)
      .attr("text-anchor", "end")
      .attr("dy", ".35em")
      .text(p);
​
  // Add a group for each Level.
  var Levels = svg.selectAll(".Level")
      .data(Levels)
    .enter().append("g")
      .attr("class", "Level")
      .attr("xlink:title", function(d) { return d.key; })
      .attr("transform", function(d) { return "translate(" + x(d.offset / sum) + ")"; });
​
  // Add a rect for each Boro.
  var Boros = Levels.selectAll(".Boro")
      .data(function(d) { return d.values; })
    .enter().append("a")
      .attr("class", "Boro")
      .attr("xlink:title", function(d) { return d.Boro + " " + d.parent.key + ": " + n(d.value*100)+"%"; })
    .append("rect")
      .attr("y", function(d) { return y(d.offset / d.parent.sum); })
      .attr("height", function(d) { return y(d.value / d.parent.sum); })
      .attr("width", function(d) { return x(d.parent.sum / sum); })
      .style("fill", function(d) { return z(d.Boro); });
​
      //Boros.exit.remove();
});
​
    });
​
​
​
</script>
​
​
​
​
    </script>
  </body>
</html>
    