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%;
    }
  </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) => {
//       console.log(data)
      //clean the data
      data.forEach(d => {
//         console.log(d)
        d.date = d3.timeParse("%Y%m%d")(d.date);
        d.date = new Date(d.date); // date labels for x-axis
        d[city] = +d[city]; // city-specific temperature labels for y-axis
      });
      
      //set up scales
      var xExtent = d3.extent(data, d => d.date);
      var xScale = d3.scaleTime()
      						.domain(xExtent)
      						.range([margin.left, width - margin.right]);
            
      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 rectanges
      var svg = d3.select('svg');

var rect = svg.selectAll('rect')
      	.data(data)
      	.enter().append('rect')
      	.attr('width', 2)
      	.attr('x', d => xScale(d.date))
      	.attr('y', d => yScale(d[city]))
      	
      	.attr('height', d => heightScale(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,0] +')')
      	.call(yAxis);

});
    
   
  </script>
</body>

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