Stacked Bars

Stacked bars showing estimated religion by top 5 countries in 2010. This is an example from the tutorial Splitting Charts. The data shown is from this report on The Global Religious Landscape from Pew Research, generated using this processing script.

Draws from Stacked-to-Grouped Bars
Tooltip logic draws from World City Explorer

forked from curran's block: Stacked Bars

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>D3 Example</title>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3-legend/1.1.0/d3-legend.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3-tip/0.6.3/d3-tip.min.js"></script>
    <link href='https://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
    <style>
    
      .axis text {
        font-family: 'Open Sans', sans-serif;
        font-size: 19pt;
      }
      .axis .label {
        font-size: 20pt;
      }

.axis path, .axis line {
        fill: none;
        stroke: #000;
        shape-rendering: crispEdges;
      }

.color-legend text {
        font-family: 'Open Sans', sans-serif;
        font-size: 19pt;
      }
      
      .d3-tip {
        font-family: 'Open Sans', sans-serif;
        font-size: 19pt;
        line-height: 1;
        padding: 7px;
        background: black;
        color: lightgray;
        border-radius: 20px;
      }
      
    </style>
  </head>
  <body>
    <script>
      var outerWidth = 960;
      var outerHeight = 500;
      var margin = { left: 130, top: 44, right: 30, bottom: 47 };
      var barPadding = 0.2;

var xColumn = "country";
      var yColumn = "population";
      var colorColumn = "religion";
      var layerColumn = colorColumn;
      
      var hoveredColorValue;
      var hoveredStrokeColor = "black";

var innerWidth  = outerWidth  - margin.left - margin.right;
      var innerHeight = outerHeight - margin.top  - margin.bottom;

var svg = d3.select("body").append("svg")
        .attr("width",  outerWidth)
        .attr("height", outerHeight);
      var g = svg.append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
      
      // This is the layer where the bars are drawn.
      var baseBarLayer = g.append("g");
      
      // This layer contains a semi-transparent overlay
      // that fades out the base bars.
      var overlayRect = g.append("g")
        .append("rect")
        .attr("width", innerWidth)
        .attr("height", innerHeight)
        .style("pointer-events", "none");
      
      // This contains the subset of bars rendered on top
      // when you hover over the entries in the color legend.
      var foregroundBarLayer = g.append("g");
      
      var xAxisG = g.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + innerHeight + ")");
      var yAxisG = g.append("g")
        .attr("class", "y axis");
      var colorLegendG = g.append("g")
        .attr("class", "color-legend")
        .attr("transform", "translate(596, 0)");

var xScale = d3.scale.ordinal().rangeBands([0, innerWidth], barPadding);
      var yScale = d3.scale.linear().range([innerHeight, 0]);
      var colorScale = d3.scale.category10();
      
      var tipNumberFormat = d3.format(",");
      var tip = d3.tip()
        .attr("class", "d3-tip")
        .offset([-10, 0])
        .html(function(d) {
          return [
            d[colorColumn],
            " in ",
            d[xColumn],
            ": ",
            tipNumberFormat(d[yColumn])
          ].join("");
        });
      g.call(tip);
      
      // Use a modified SI formatter that uses "B" for Billion.
      var siFormat = d3.format("s");
      var customTickFormat = function (d){
        return siFormat(d).replace("G", "B");
      };

var xAxis = d3.svg.axis().scale(xScale).orient("bottom")
        .outerTickSize(0);
      var yAxis = d3.svg.axis().scale(yScale).orient("left")
        .ticks(5)
        .tickFormat(customTickFormat)
        .outerTickSize(0);

var colorLegend = d3.legend.color()
        .scale(colorScale)
        .shapePadding(6.24)
        .shapeWidth(25)
        .shapeHeight(25)
        .labelOffset(5);

function render(data){

var nested = d3.nest()
          .key(function (d){ return d[layerColumn]; })
          .entries(data);

var stack = d3.layout.stack()
          .y(function (d){ return d[yColumn]; })
          .values(function (d){ return d.values; });

var layers = stack(nested.reverse()).reverse();

xScale.domain(layers[0].values.map(function (d){
          return d[xColumn];
        }));

yScale.domain([
          0,
          d3.max(layers, function (layer){
            return d3.max(layer.values, function (d){
              return d.y0 + d.y;
            });
          })
        ]);

colorScale.domain(layers.map(function (layer){
          return layer.key;
        }));

xAxisG.call(xAxis); 
        yAxisG.call(yAxis);

renderBars(baseBarLayer, layers);
        
        if(hoveredColorValue){
          setOverlayTransparency(0.7);
          renderBars(foregroundBarLayer, layers.filter(function (layer){
            return layer.key === hoveredColorValue;
          }));
        } else {
          setOverlayTransparency(0.0);
          renderBars(foregroundBarLayer, []);
        }
        
        colorLegendG.call(colorLegend);
        
        // Move the text down a bit.
        colorLegendG.selectAll("text").attr("y", 4);
        
        listenForHover(colorLegendG.selectAll("rect"), data);
        listenForHover(colorLegendG.selectAll("text"), data);
      }
      
      function setOverlayTransparency(alpha){
        overlayRect
          .transition().duration(400)
          .attr("fill", "rgba(255, 255, 255, " + alpha + ")");
      }
      
      function renderBars(g, layers){
        var layerGs = g.selectAll(".layer").data(layers);
        layerGs.enter().append("g").attr("class", "layer");
        layerGs.exit().remove();
        layerGs.style("fill", function (d){
          return colorScale(d.key);
        });

function type(d){
        d.population = +d.population;
        return d;
      }

d3.csv("religionByCountryTop5.csv", type, render);

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

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js

https://cdnjs.cloudflare.com/ajax/libs/d3-legend/1.1.0/d3-legend.js

https://cdnjs.cloudflare.com/ajax/libs/d3-tip/0.6.3/d3-tip.min.js