D3 Examples - Stacked bar chart v4

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<!DOCTYPE html>
<style>
​
.axis .domain {
  display: none;
}
​
</style>
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-transition.v1.min.js"></script>
<script>
​
// Source: https://bl.ocks.org/mbostock/3886208
var n = 10, // number of samples
    m = 5; // number of series
​
var data = d3.range(m).map(function() { 
  return d3.range(n).map(Math.random); 
});
​
var margin = {top: 20, right: 30, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
​
var y = d3.scaleLinear()
    .domain([0, n])
    .rangeRound([height, 0])
        .nice();
​
var x = d3.scaleBand()
    .rangeRound([0, width])
    .paddingInner(0.05)
    .align(0.1)
    .domain(d3.range(n));
  
var x0 = d3.scaleBand()
    .domain(d3.range(n))
    .range([0, width], .2);
  
var x1 = d3.scaleBand()
    .domain(d3.range(m))
    .range([0, x0.bandwidth() - 10]);
​
var z = d3.scaleOrdinal()
    .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
​
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
svg.append("g").selectAll("g")
        .data(data)
  .enter().append("g")
    .style("fill", function(d) { return z(d3.stack().keys(d3.range(n))(d).key); })  
    .selectAll("rect")
  .data(function(d) { return d3.stack().keys(d3.range(n))(d); })
    .enter().append("rect")
      .attr("x", function(d, i) { return x(i); })
      .attr("y", function(d) { return y(d3.stack().keys(d3.range(n))(d)[1]); })
      .attr("height", function(d) { return y(d[0]) - y(d[1]); })
      .attr("width", x.bandwidth());
  
  //d3.stack().keys(d3.range(n))(data)
svg.selectAll("rect")
  .transition()
  .duration(500)
  .delay(700)
    .attr("transform", function(d, i) { return "translate(" + x1(i) + ",0)"; })
  .selectAll("rect")
    .attr("width", x1.bandwidth())
    .attr("height", y)
    .attr("x", function(d, i) { return x0(i); })
    .attr("y", function(d) { return height - y(d); });
  
​
​
</script>
    