Line chart

<!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; }
    .chart {
      background: lightgray;
      border: 1px solid black;
    }
  </style>
</head>

<body>
  <div class="chart"></div>
  <script>
		var margin = { top: 10, right: 10, bottom: 25, left: 25}
    var width = 425 - margin.left - margin.right;
    var height = 625 - margin.top - margin.bottom;
    var svg = d3.select('.chart')
    	.append('svg')
        .attr('width', width + margin.left + margin.right)
        .attr('height', height + margin.top + margin.bottom)
    	.call(responsivefy)
      .append('g')
        .attr('transform', `translate(${margin.left}, ${margin.top})`)
    
    var data = [
  {
    "ticker": "AMZN",
    "values": [
      {
        "date": "2016/09/30",
        "close": 837.31
      },
      {
        "date": "2016/09/29",
        "close": 829.05
      },
      {
        "date": "2016/09/28",
        "close": 828.72
      },
      {
        "date": "2016/09/27",
        "close": 816.11
      },
      {
        "date": "2016/09/26",
        "close": 799.16
      },
      {
        "date": "2016/09/23",
        "close": 805.75
      },
      {
        "date": "2016/09/22",
        "close": 804.7
      },
      {
        "date": "2016/09/21",
        "close": 789.74
      },
      {
        "date": "2016/09/20",
        "close": 780.22
      },
      {
        "date": "2016/09/19",
        "close": 775.1
      },
      {
        "date": "2016/09/16",
        "close": 778.52
      },
      {
        "date": "2016/09/15",
        "close": 769.69
      },
      {
        "date": "2016/09/14",
        "close": 761.09
      },
      {
        "date": "2016/09/13",
        "close": 761.01
      },
      {
        "date": "2016/09/12",
        "close": 771.49
      },
      {
        "date": "2016/09/09",
        "close": 760.14
      },
      {
        "date": "2016/09/08",
        "close": 784.06
      },
      {
        "date": "2016/09/07",
        "close": 784.48
      },
      {
        "date": "2016/09/06",
        "close": 788.87
      },
      {
        "date": "2016/09/02",
        "close": 772.44
      },
      {
        "date": "2016/09/01",
        "close": 770.62
      },
      {
        "date": "2016/08/31",
        "close": 769.16
      },
      {
        "date": "2016/08/30",
        "close": 767.58
      },
      {
        "date": "2016/08/29",
        "close": 771.29
      },
      {
        "date": "2016/08/26",
        "close": 769
      },
      {
        "date": "2016/08/25",
        "close": 759.22
      },
      {
        "date": "2016/08/24",
        "close": 757.25
      },
      {
        "date": "2016/08/23",
        "close": 762.45
      },
      {
        "date": "2016/08/22",
        "close": 759.48
      },
      {
        "date": "2016/08/19",
        "close": 757.31
      },
      {
        "date": "2016/08/18",
        "close": 764.46
      },
      {
        "date": "2016/08/17",
        "close": 764.63
      },
      {
        "date": "2016/08/16",
        "close": 764.04
      },
      {
        "date": "2016/08/15",
        "close": 768.49
      },
      {
        "date": "2016/08/12",
        "close": 772.56
      },
      {
        "date": "2016/08/11",
        "close": 771.24
      },
      {
        "date": "2016/08/10",
        "close": 768.56
      },
      {
        "date": "2016/08/09",
        "close": 768.31
      },
      {
        "date": "2016/08/08",
        "close": 766.56
      },
      {
        "date": "2016/08/05",
        "close": 765.98
      },
      {
        "date": "2016/08/04",
        "close": 760.77
      },
      {
        "date": "2016/08/03",
        "close": 754.64
      },
      {
        "date": "2016/08/02",
        "close": 760.58
      },
      {
        "date": "2016/08/01",
        "close": 767.74
      },
      {
        "date": "2016/07/29",
        "close": 758.81
      },
      {
        "date": "2016/07/28",
        "close": 752.61
      },
      {
        "date": "2016/07/27",
        "close": 736.67
      },
      {
        "date": "2016/07/26",
        "close": 735.59
      },
      {
        "date": "2016/07/25",
        "close": 739.61
      },
      {
        "date": "2016/07/22",
        "close": 744.86
      },
      {
        "date": "2016/07/21",
        "close": 744.43
      },
      {
        "date": "2016/07/20",
        "close": 745.72
      },
      {
        "date": "2016/07/19",
        "close": 739.95
      },
      {
        "date": "2016/07/18",
        "close": 736.07
      },
      {
        "date": "2016/07/15",
        "close": 735.44
      },
      {
        "date": "2016/07/14",
        "close": 741.2
      },
      {
        "date": "2016/07/13",
        "close": 742.63
      },
      {
        "date": "2016/07/12",
        "close": 748.21
      },
      {
        "date": "2016/07/11",
        "close": 753.78
      },
      {
        "date": "2016/07/08",
        "close": 745.81
      },
      {
        "date": "2016/07/07",
        "close": 736.57
      },
      {
        "date": "2016/07/06",
        "close": 737.61
      },
      {
        "date": "2016/07/05",
        "close": 728.1
      },
      {
        "date": "2016/07/01",
        "close": 725.68
      }
    ]
  },
  {
    "ticker": "GOOG",
    "values": [
      {
        "date": "2016/09/30",
        "close": 777.29
      },
      {
        "date": "2016/09/29",
        "close": 775.01
      },
      {
        "date": "2016/09/28",
        "close": 781.56
      },
      {
        "date": "2016/09/27",
        "close": 783.01
      },
      {
        "date": "2016/09/26",
        "close": 774.21
      },
      {
        "date": "2016/09/23",
        "close": 786.9
      },
      {
        "date": "2016/09/22",
        "close": 787.21
      },
      {
        "date": "2016/09/21",
        "close": 776.22
      },
      {
        "date": "2016/09/20",
        "close": 771.41
      },
      {
        "date": "2016/09/19",
        "close": 765.7
      },
      {
        "date": "2016/09/16",
        "close": 768.88
      },
      {
        "date": "2016/09/15",
        "close": 771.76
      },
      {
        "date": "2016/09/14",
        "close": 762.49
      },
      {
        "date": "2016/09/13",
        "close": 759.69
      },
      {
        "date": "2016/09/12",
        "close": 769.02
      },
      {
        "date": "2016/09/09",
        "close": 759.66
      },
      {
        "date": "2016/09/08",
        "close": 775.32
      },
      {
        "date": "2016/09/07",
        "close": 780.35
      },
      {
        "date": "2016/09/06",
        "close": 780.08
      },
      {
        "date": "2016/09/02",
        "close": 771.46
      },
      {
        "date": "2016/09/01",
        "close": 768.78
      },
      {
        "date": "2016/08/31",
        "close": 767.05
      },
      {
        "date": "2016/08/30",
        "close": 769.09
      },
      {
        "date": "2016/08/29",
        "close": 772.15
      },
      {
        "date": "2016/08/26",
        "close": 769.54
      },
      {
        "date": "2016/08/25",
        "close": 769.41
      },
      {
        "date": "2016/08/24",
        "close": 769.64
      },
      {
        "date": "2016/08/23",
        "close": 772.08
      },
      {
        "date": "2016/08/22",
        "close": 772.15
      },
      {
        "date": "2016/08/19",
        "close": 775.42
      },
      {
        "date": "2016/08/18",
        "close": 777.5
      },
      {
        "date": "2016/08/17",
        "close": 779.91
      },
      {
        "date": "2016/08/16",
        "close": 777.14
      },
      {
        "date": "2016/08/15",
        "close": 782.44
      },
      {
        "date": "2016/08/12",
        "close": 783.22
      },
      {
        "date": "2016/08/11",
        "close": 784.85
      },
      {
        "date": "2016/08/10",
        "close": 784.68
      },
      {
        "date": "2016/08/09",
        "close": 784.26
      },
      {
        "date": "2016/08/08",
        "close": 781.76
      },
      {
        "date": "2016/08/05",
        "close": 782.22
      },
      {
        "date": "2016/08/04",
        "close": 771.61
      },
      {
        "date": "2016/08/03",
        "close": 773.18
      },
      {
        "date": "2016/08/02",
        "close": 771.07
      },
      {
        "date": "2016/08/01",
        "close": 772.88
      },
      {
        "date": "2016/07/29",
        "close": 768.79
      },
      {
        "date": "2016/07/28",
        "close": 745.91
      },
      {
        "date": "2016/07/27",
        "close": 741.77
      },
      {
        "date": "2016/07/26",
        "close": 738.42
      },
      {
        "date": "2016/07/25",
        "close": 739.77
      },
      {
        "date": "2016/07/22",
        "close": 742.74
      },
      {
        "date": "2016/07/21",
        "close": 738.63
      },
      {
        "date": "2016/07/20",
        "close": 741.19
      },
      {
        "date": "2016/07/19",
        "close": 736.96
      },
      {
        "date": "2016/07/18",
        "close": 733.78
      },
      {
        "date": "2016/07/15",
        "close": 719.85
      },
      {
        "date": "2016/07/14",
        "close": 720.95
      },
      {
        "date": "2016/07/13",
        "close": 716.98
      },
      {
        "date": "2016/07/12",
        "close": 720.64
      },
      {
        "date": "2016/07/11",
        "close": 715.09
      },
      {
        "date": "2016/07/08",
        "close": 705.63
      },
      {
        "date": "2016/07/07",
        "close": 695.36
      },
      {
        "date": "2016/07/06",
        "close": 697.77
      },
      {
        "date": "2016/07/05",
        "close": 694.49
      },
      {
        "date": "2016/07/01",
        "close": 699.21
      }
    ]
  }
]

// data cleansing
    var parseTime = d3.timeParse('%Y/%m/%d');
    data.forEach(company => {
      company.values.forEach( d => {
        d.date = parseTime(d.date)
        d.close = +d.close
      })
    })
//     console.log(data)
    
//     console.log(d3.extent(data, co => d3.extent(co.values, d => d.close)));
//     console.log([
//       d3.min(data, co => d3.min(co.values, d => d.close )),
//       d3.max(data, co => d3.max(co.values, d => d.close ))
//     ])
    
    // draw y axis
    var yScale = d3.scaleLinear()
    	.domain([
        d3.min(data, co => d3.min(co.values, d => d.close )),
        d3.max(data, co => d3.max(co.values, d => d.close ))
      ])
    	.range([height, 0])
   	var yAxis = d3.axisLeft(yScale)
    svg.append('g')
    	.attr('transform', `translate(${margin.left}, ${margin.top})`)
    	.call(yAxis)

// draw x axis
    var xScale = d3.scaleTime()
    	.domain([
        d3.min(data, co => d3.min(co.values, d => d.date)),
        d3.max(data, co => d3.max(co.values, d => d.date))
      ])
    	.range([0, width])
    var xAxis = d3.axisBottom(xScale)
    	.ticks(5)
    svg.append('g')
    	.attr('transform', `translate(0, ${height})`)
    	.call(xAxis)
    
    var line = d3.line()
    	.x(d => xScale(d.date))
    	.y(d => yScale(d.close))
    	.curve(d3.curveCatmullRom.alpha(0.5))
    
    svg.selectAll('.line')
    	.data(data)
    	.enter()
    	.append('path')
    	.attr('class','line')
    	.attr('d', d => line(d.values))
    	.style('stroke', (d, i) => ['#FF9900', '#3369E8'][i])
    	.style('stroke-width', 2)
    	.style('fill', 'none')
    
    function responsivefy(svg) {
      // get container + svg aspect ratio
      var container = d3.select(svg.node().parentNode),
          width = parseInt(svg.style("width")),
          height = parseInt(svg.style("height")),
          aspect = width / height;

// add viewBox and preserveAspectRatio properties,
      // and call resize so that svg resizes on inital page load
      svg.attr("viewBox", "0 0 " + width + " " + height)
          .attr("preserveAspectRatio", "xMinYMid")
          .call(resize);

// to register multiple listeners for same event type,
      // you need to add namespace, i.e., 'click.foo'
      // necessary if you call invoke this function for multiple svgs
      // api docs: https://github.com/mbostock/d3/wiki/Selections#on
      d3.select(window).on("resize." + container.attr("id"), resize);

// get width of container and resize svg to fit it
      function resize() {
          var targetWidth = parseInt(container.style("width"));
          svg.attr("width", targetWidth);
          svg.attr("height", Math.round(targetWidth / aspect));
      }
    }

</script>
</body>

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