D3 Examples - FEM: Exercise 1 starter

xxxxxxxxxx
 
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body {
      margin: 0;
      position: relative;
      top: 10;
      right: 0;
      bottom: 0;
      left: 0; 
      height: 1000px;
    }
    svg {
      width: 100%;
      height: 100%;
    }
  </style>
</head>
​
<body>
  <svg></svg>
  <script>
    var city = 'New York';
    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', (err, data) => {
      // clean the data
      data.forEach(d => {
        d.date = d3.timeParse("%Y%m%d")(d.date);
        d.date = new Date(d.date); // x, date
        d[city] = ++d[city]; // y, city name
      });
      
      // axis and scale
      var xExtent = d3.extent(data, d => d.date); // [min, max]
      var yExtent = d3.extent(data, d => d[city]);
      
      var heightScale = d3.scaleLinear()
        .domain(yExtent)
        .range([0, height - margin.top - margin.bottom]);
      
       var xScale = d3.scaleTime()
        .domain(xExtent)
        .range([margin.left, width - margin.right]);
      
       var yScale = d3.scaleLinear()
        .domain(yExtent)
        .range([height - margin.bottom, margin.top]);
      
      // create rectangles
        var svg = d3.select('svg');
      
      var rect = svg.selectAll('rect')
        .data(data)
        .enter().append('rect')
        .attr('width', 6)
        .attr('x', (d) => xScale(d.date))
        .attr('y', (d) => yScale(d[city]))
        .attr('height', (d) => heightScale(d[city]))
        .attr('fill', '#2962FF')
        .attr('stroke', 'black')
    
    // Appending axis
    var xAxis = d3.axisBottom().scale(xScale)
        .tickFormat(d3.timeFormat('%b %Y'))
    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, 0] + ')').call(yAxis);
    
  });
  </script>
</body>
​
    