D3 Examples - FEM - Example 1

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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;
    }
​
    svg {
      width: 100%;
      height: 100%;
    }
  </style>
</head>
​
<body>
  <svg></svg>
  <script>
    var city = 'Austin';
    var width = 800;
    var height = 300;
    var margin = { top: 20, bottom: 20, left: 20, right: 20 };
​
    // dataset of city temperatures across time
    d3.tsv('data.tsv', function (err, data) {
      // clean the data
      data.forEach(function (d) {
        d.date = d3.timeParse('%Y%m%d')(d.date);
        d.date = new Date(d.date); // x
        d[city] = ++d[city]; // y
      });
​
      // scales
      var xExtent = d3.extent(data, function (d) {
        return d.date;
      });
      var xScale = d3
        .scaleTime()
        .domain(xExtent)
        .range([margin.left, width - margin.right]);
​
      var yMax = d3.max(data, function (d) {
        return d[city];
      });
      var yScale = d3
        .scaleLinear()
        .domain([0, yMax])
        .range([height - margin.bottom, margin.top])
      var heightScale = d3
        .scaleLinear()
        .domain([0, yMax])
        .range([0, height - margin.top - margin.bottom])
​
      // make the rectangles
​
      var svg = d3.select('svg');
​
      var rect = svg
        .selectAll('rect')
        .data(data)
        .enter()
        .append('rect')
        .attr('width', 2)
        .attr('height', function (d) {
          return heightScale(d[city]);
        })
        .attr('x', function (d) {
          return xScale(d.date);
        })
        .attr('y', function (d) {
          return yScale(d[city]);
        })
        .attr('fill', 'blue')
        .attr('stroke', 'white');
​
      var xAxis = d3.axisBottom()
        .scale(xScale);
      var yAxis = d3.axisLeft()
        .scale(yScale);
​
      svg.append('g')
        .attr('transform', `translate(0, ${height - margin.bottom})`)
        .call(xAxis);
​
      svg.append('g')
        .attr('transform', `translate(${margin.left})`)
        .call(yAxis.ticks(5));
​
    });
  </script>
</body>
    