D3 Examples - Gapminder time series

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<!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>
​
<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body")
      .append("svg")
      .attr("width", 960)
      .attr("height", 500);
​
    d3.csv("gapminder_time_subset.csv",function(dataWeLoaded) {
​
      var xScale = d3.scaleLinear()
        .domain([0,40000])
        .range([100,800]);
      var xScaleTime = d3.scaleLinear()
        .domain([1950,2010])
        .range([100,800]);
      var yScale = d3.scaleLinear()
        .domain([30,80])
        .range([400,100]);
      var rScale = d3.scaleSqrt()
        .domain([0,d3.max(dataWeLoaded, function(d) { return +d.population;})])
        .range([0,100]);
​
      var colorScale = d3.scaleOrdinal(d3.schemeCategory10);
​
      var chinaData = dataWeLoaded.filter(function(d) { return d.country == 'China';});
      var indiaData = dataWeLoaded.filter(function(d) { return d.country == 'India';});
      var usData = dataWeLoaded.filter(function(d) { return d.country == 'United States';});
​
      var data = [{
                    id: 'China',
                    values: chinaData
                  },{
                    id: 'India',
                    values: indiaData
                  },{
                    id: 'United States',
                    values: usData
                  }];
​
      // Create a line generator
      var line = d3.line()
          .x(function(d) { return xScaleTime(+d.year);})
          .y(function(d) { return yScale(+d.lifeexp);})
​
      svg.selectAll("path")
          .data(data)
        .enter()
          .append("path")
          .attr("fill", "none")
          .attr("stroke", function(d) { return colorScale(d.id);})
          .attr("stroke-linejoin", "round")
          .attr("stroke-linecap", "round")
          .attr("stroke-width", 1.5)
          .attr("d", function(d) { return line(d.values);});
      
      svg.selectAll("text")
          .data(data)
        .enter()
          .append("text")
          .text(function(d) { return d.id; })
          .attr("font-size",10)
          .attr("font-family","sans-serif")
          .attr("transform", function(d) { return "translate(780," + yScale(+d.values.slice(-1)[0].lifeexp) + ")";})
      
/*
      // Alternate method to add one path at a time:
      svg.append("path")
          .datum(chinaData)
          .attr("fill", "none")
          .attr("stroke", function(d) { return colorScale(d.country);})
          .attr("stroke-linejoin", "round")
          .attr("stroke-linecap", "round")
          .attr("stroke-width", 1.5)
          .attr("d", line);
*/
​
      var leftAxis = d3.axisLeft(yScale);
      var bottomAxis = d3.axisBottom(xScaleTime)
          .tickFormat(d3.format("d"));
​
      svg.append("g")
          .attr("transform", "translate(100,0)")
          .call(leftAxis);
​
      svg.append("g")
          .attr("transform", "translate(0,400)")
          .call(bottomAxis);
​
      svg.append("text")
          .text("life expectancy")
          .attr("transform", "translate(60,90)")
          .attr("font-size",10)
          .attr("font-family","sans-serif")
​
      svg.append("text")
          .text("year")
          .attr("transform", "translate(770,430)")
          .attr("font-size",10)
          .attr("font-family","sans-serif")
​
    })
​
  </script>
</body>
​
    