Mosaic Plot Example

<!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>

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);

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);

//Boros.exit.remove();
});

});

</script>

</script>
  </body>
</html>

https://d3js.org/d3.v4.min.js