age pyramid treemap

<!DOCTYPE html>
<meta charset="utf-8">
<style>
  body {
    font-family: Helvetica;
    font-size: 10px;
  }

.point {
    fill: black;
  }

rect {
    fill: none;
    stroke: black;
    stroke-width: 1;
  }
</style>
<body>
<script src="https://d3js.org/d3.v4.js"></script>
<script src="https://romsson.github.io/d3-gridding/build/d3-gridding.js"></script>
<script src="https://romsson.github.io/d3-gridding/example/utils/utils.js"></script>
<script>
var width = 400,
    height = 300;

var data = [], nb_year = 4, nb_flow = 2, nb_product = 28;

d3.range(nb_year).map(function(y) {
  d3.range(nb_flow).map(function(f) {
    d3.range(nb_product).map(function(p) {
      data.push({"year": y, "flow": f, "product": p});
    });
  });
});

var svgSquares = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
  .append("g");

function update() {

nested_data = generate_nesting_agg([
    {groupBy: "", fn: function(d) { return d.length}, accessor: function(d) { return d; }},
    {groupBy: "year", fn: function(d, i) {return d.length; }, accessor: function(d) { return d.value; }, sortBy: "year"},
    {groupBy: "flow", fn: function(d) {return Math.random(); }, accessor: function(d) { return d.value; }}
    ], "data");
  
  console.log("NESTED", nested_data)

draw(svgSquares, nested_data[0], params, 0, "0_", false);

d3.selectAll(".index").remove();

}

update();

</script>

Modified http://d3js.org/d3.v4.js to a secure url

Modified http://romsson.github.io/d3-gridding/build/d3-gridding.js to a secure url

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

https://romsson.github.io/d3-gridding/build/d3-gridding.js

https://romsson.github.io/d3-gridding/example/utils/utils.js