FEM: Exercise 1

<!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%;
      box-sizing: border-box;
      padding: 20px;
    }
  </style>
</head>

<body>
  <svg />
  <script>
		var city = "New York",
        width = 800,
        height = 300
    		margin = {top: 20, right: 20, bottom: 20, left: 20};
    
    // dataset of city temperatures across time
    d3.tsv('data.tsv', (err, data) => {
      //console.log(data);
      //clean the data
      data.forEach(d => {
        d.date = d3.timeParse("%Y%m%d")(d.date);
        d.date = new Date(d.date); //x
        d[city] = ++d[city]; //y
      });
      
      //x scales
      var xExtent = d3.extent(data, d => d.date);
      var xScale = d3.scaleTime()
      	.domain(xExtent)
      	.range([margin.left, width - margin.right]);
      
      //y scales
      var yExtent = d3.extent(data, d => d[city]);
      var yScale = d3.scaleLinear()
      	.domain(yExtent)
      	.range([height - margin.bottom, margin.top]);
      
      var heightScale = d3.scaleLinear()
      	.domain(yExtent)
      	.range([0, height - margin.top - margin.bottom]);
      
      //create the rectangles
      var svg = d3.select('svg');

var rect = svg.selectAll('rect')
        .data(data)
      	.enter().append('rect')
      	.attr('width', 2)
      	.attr('height', d => heightScale(d[city]))
      	.attr('x', function(d) {
          return xScale(d.date)
        })
      	.attr('y', function(d) {
          return yScale(d[city])
        })
      	.attr('fill', 'red')
      	.attr('stroke', 'white');
      
      
      //define Axis
      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);
      	
    });

</script>
</body>

https://d3js.org/d3.v4.min.js