D3 Examples - [unlisted] Satellites by Countries Interactive

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <title>Top Internet Countries Visualization</title>
    <style>
      body {
        margin: 0px;
      }
      .domain {
        display: none;
      }
      .tick line {
        stroke: #C0C0BB;
      }
      .tick text {
        fill: #8E8883;
        font-size: 8pt;
        font-family: sans-serif;
      }
      .axis-label {
        fill: #635F5D;
        font-size: 20pt;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <svg width="960" height="500"></svg>
    <script>
​
      const xValue = d => d.Country;
      const xLabel = 'Country';
      const yValue = "Number";
      const yLabel = 'Total Satellites';
      const colorColumn = 'Purpose';
      const layerColumn = "Purpose";
      
      
      const margin = { left: 150, right: 70, top: 20, bottom: 200 };
​
      const svg = d3.select('svg');
      const width = svg.attr('width');
      const height = svg.attr('height');
      const innerWidth = width - margin.left - margin.right;
      const innerHeight = height - margin.top - margin.bottom;
  
           
      const g = svg.append('g')
          .attr('transform', `translate(${margin.left},${margin.top})`);
      const xAxisG = g.append('g')
          .attr('transform', `translate(0, ${innerHeight})`);
      const yAxisG = g.append('g');
​
      xAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', innerWidth / 2)
          .attr('y', 185)
          .text(xLabel);
​
      yAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', -innerHeight / 2 - 30)
          .attr('y', -100)
          .attr('transform', `rotate(-90)`)
          .style('text-anchor', 'middle')
          .text(yLabel);
​
      const xScale = d3.scaleBand()
        .paddingInner(0.3)
        .paddingOuter(0.2);
      const yScale = d3.scaleLinear();
​
      const xAxis = d3.axisBottom()
        .scale(xScale)
        .tickSize(-innerHeight);
​
      const yTicks = 10;
      const yAxis = d3.axisLeft()
        .scale(yScale)
        .ticks(yTicks)
        .tickPadding(15)
        //.tickFormat(d3.format('.0s'))
        .tickSize(-innerWidth);
​
      const colorScale = d3.scaleOrdinal(d3.schemeCategory10);
      
      
      
      function render(data){
        colorScale.domain(data.map(function (d){
          return d[colorColumn];
        }));
        
       
        var nested = d3.nest()
          .key(xValue)
          .key(function (d) {return d[layerColumn];})
          .rollup(function (d) { return d[0].Number; })
          .object(data);
        
        var purposes = Object.keys(d3.nest()
          .key(function (d) {return d[layerColumn];})
          .object(data));
        
        //console.log(purposes);
        
        var transformed = Object.keys(nested)
          .map(function (country) {
            var row = {};
            purposes.forEach(function (purpose){
              if(nested[country][purpose]){
                row[purpose] = nested[country][purpose];
              } else {
                // Fill in zero for missing values.
                row[purpose] = 0;
              }
            });
            row.Country = country;
            return row;
          });
        
        console.log(transformed);
         
        var stack = d3.stack()
            .keys(purposes)
          .order(d3.stackOrderNone)
          .offset(d3.stackOffsetNone);
        
        var stacked = stack(transformed); 
        
        console.log(stacked);
        
        xScale
          .domain(data.map(xValue)).range([0, innerWidth]);
​
        yScale
          .domain([0, d3.max(stacked.map(function (d){
            return d3.max(d, function (d){ return d[1];});
          }))])
        //.domain([0, d3.max(data, yValue)])
          .range([innerHeight, 0])
          .nice(yTicks);
        var layers = g.selectAll('g').data(stacked)
          .enter().append('g')
          .attr('fill', function(d) {
            //console.log(d.key)
            return colorScale(d.key);
          });
        
        var pancakes = layers.selectAll('rect').data(function (d) { return d; })
          .enter().append('rect')
            .attr('width', d => xScale.bandwidth()) 
            .attr('x', function (d) {
              return xScale(xValue(d.data))
            })//d => xScale(xValue(d)))
            .attr('y', function (d) {
              return yScale(d[1]);
            })//d => yScale(yValue(d)))
            .attr('height', function (d) {
              return yScale(d[0]) - yScale(d[1]);
            }) //d => innerHeight - yScale(yValue(d)));
       
​
        xAxisG.call(xAxis);
        xAxisG.selectAll('.tick line').remove();
        xAxisG.selectAll('.tick text')
            .attr('transform', 'rotate(-45)')
            .attr('text-anchor', 'end')
            .attr('alignment-baseline', 'middle')
            .attr('x', -5)
            .attr('y', 6)
            .attr('dy', 0);
​
        yAxisG.call(yAxis);
        
        function print(data){
          d3.select("body").append("pre")
            .text(JSON.stringify(nested, null, 2));
        }
        print()
      }
 
      
      
       function type(d) {
          d.Number = +d.Number;
          return d;
       }
      
      d3.csv('satpurpose.csv', type, render);
      
  
    </script>
  </body>
</html>
​
    