test: city temperature

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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 = 'San Francisco';
    var width = 800;
    var height = 300;
    
    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];
      });
    });
  </script>
</body>
​
    

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