D3 Examples - Organic Lemon Prices

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
  </style>
</head>
​
<body>
  <svg width=800 height=400></svg>
  <script>
    
    var width = 700;
    var height = 300;
    var margin = {top: 20, bottom: 20, left: 40, right: 20};
    
    // dataset of commodity prices across time
    d3.csv('midwest.csv', (err, data) => {
​
      // clean the data
      data.forEach(d => {
        
        d.date = d3.timeParse("%Y%m%d")(d.Date);
        d.date = new Date(d.Date); // x
        
        d.price = ++d["Weighted Avg Price"]; // y
        
      });
      
      // 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.price);
      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]);
     //console.log(heightScale(6));
      // create the rectangles
      var svg = d3.select('svg');
      
      var rect = svg.selectAll('rect')
        .data(data)
        .enter()
        .append('rect')
        .attr('width', 5)
        .attr('height', function(d) {          
          return heightScale(d.price);
        })
        .attr('x', function(d) { return xScale(d.date)})
        .attr('y', function(d) { return yScale(d.price)})
        .attr('fill', 'yellow')
        .attr('stroke', 'white');
      
      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>
​
    