Metis Stack Chart CO2 emissions by Fuel Type and Vehicle

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

var margin = {top: 10, right: 20, bottom: 20, left: 60},
      width = 960 - margin.left - margin.right,
      height = 500 - margin.top - margin.bottom;

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 + ")");

var g = svg.append("g")

var allVehicleTypeKeys = ["generator", "hybrid car", "car", "hybrid SUV", "van, pickup, SUV", "truck (<18 wheels)", "18 wheeler", "bus"];
    var allFuelTypeKeys = ['diesel','B20','gasoline','B100','CNG'];

d3.csv("ImpactOfFuel.csv", function(d, i, columns) {
        for (i = 1, t = 0; i < columns.length; ++i) t += d[columns[i]] = +d[columns[i]];
        d.total = t;
        return d;
      }, function(error, data) {
        if (error) throw error;
        console.log('original', data);
        data.sort(function(a, b) { return b.total - a.total; });

var yStackMax = d3.max(data, function(d) { return d.total; });
        var z = d3.scaleOrdinal()
                  .domain(allVehicleTypeKeys)
                  .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00", "#ff8c00"]);
        var y = d3.scaleLinear()
                  .domain([0, yStackMax])
                  .rangeRound([height, 0]);
        var x = d3.scaleBand()
                  .domain(data.map(function(d) { return d.vehicleType; }))
                  .rangeRound([0, width])
                  .paddingInner(0.05)
    .align(0.1);

svg.append("g")
           .attr("class", "xAxis")
           .attr("transform", "translate(0," + height + ")")
           .call(d3.axisBottom(x))

g.append("g")
          .selectAll("g")
          .data(d3.stack().keys(allFuelTypeKeys)(data))
          .enter().append("g")
            .attr("fill", function(d) { return z(d.key); })
          .selectAll("rect")
          .data(function(d) { return d; })
          .enter().append("rect")
            .attr("x", function(d) { return x(d.data.vehicleType); })
            .attr("y", function(d) { return y(d[1]); })
            .attr("height", function(d) { return y(d[0]) - y(d[1]); })
            .attr("width", x.bandwidth())
          .on("mouseover", function() { tooltip.style("display", null); })
          .on("mouseout", function() { tooltip.style("display", "none"); })
          .on("mousemove", function(d) {
            console.log(d);
            var xPosition = d3.mouse(this)[0] - 5;
            var yPosition = d3.mouse(this)[1] - 5;
            tooltip.attr("transform", "translate(" + xPosition + "," + yPosition + ")");
            tooltip.select("text").text(d[1]-d[0]);
  });

var legend = g.append("g")
          .attr("font-family", "sans-serif")
          .attr("font-size", 10)
          .attr("text-anchor", "end")
        .selectAll("g")
        .data(allFuelTypeKeys.slice().reverse())
        .enter().append("g")
          .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

legend.append("rect")
          .attr("x", width - 19)
          .attr("width", 19)
          .attr("height", 19)
          .attr("fill", z);

legend.append("text")
          .attr("x", width - 24)
          .attr("y", 9.5)
          .attr("dy", "0.32em")
          .text(function(d) { return d; });

// Prep the tooltip bits, initial display is hidden
      var tooltip = svg.append("g")
        .attr("class", "tooltip")
        .style("display", "none");

tooltip.append("rect")
        .attr("width", 60)
        .attr("height", 20)
        .attr("fill", "white")
        .style("opacity", 0.5);

tooltip.append("text")
        .attr("x", 30)
        .attr("dy", "1.2em")
        .style("text-anchor", "middle")
        .attr("font-size", "12px")
        .attr("font-weight", "bold");

// Playing with nesting
      var nestByVehicleType = d3.nest()
          .key(function(d) { return d.vehicleType }).entries(data)
      console.log('nest by vehicle type', nestByVehicleType);
      var numberOfLayers = allFuelTypeKeys.length;
      var stack = d3.stack().keys(allFuelTypeKeys)
      console.log('stack data', stack(data));
      console.log('stack data nest by Vehicle Type', stack(nestByVehicleType));
    })

</script>
</body>

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