D3 Examples

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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/>
  <script>
    const city = 'New York';
    const width = 800;
    const height = 300;
    const margin = {
      top: 20,
      right: 20,
      bottom: 20,
      left: 20,
    };
    
    const data = d3.tsv('data.tsv', (err, data) => { 
      data.forEach(d => {
        d.date = d3.timeParse("%Y%m%d")(d.date);
        d.date = new Date(d.date);
        ++d[city];
      })
    
      // scales
      const xExtent = d3.extent(data, d => d.date);
      const xScale = d3.scaleTime()
        .domain(xExtent)
        .range([margin.left, width - margin.right]);
      
      const yMax = d3.max(data, d => d[city]);
      const yScale = d3.scaleLinear()
        .domain([0, yMax])
        .range([height - margin.bottom, margin.top]);
      
        // create line
      const line = d3.line()
        .x(d => xScale(d.date))
        .y(d => yScale(d[city]))
        .curve(d3.curveCatmullRom)
      
      const svg = d3.select('svg');
​
      svg.append('path')
        .attr('d', line(data))
        .attr('fill', 'none')
        .attr('stroke', 'blue')
        
      const xAxis = d3.axisBottom().scale(xScale);
      const 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>
​
    