D3 Examples - work graph-regression

xxxxxxxxxx
 
<!DOCTYPE html>
<head> 
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="regression.min.js"></script>
  <style>
    body { margin:20px;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {
      width: 100%;
      height: 100%;
    }
  </style>
</head>
​
<body>
  <svg></svg>
  <script>   
   
    var sample = "Standard-a",
        width = 800,
            height = 300,    
            margin = {top: 20, bottom: 20, left: 20, right: 20};
    
    d3.csv('data.csv', (err, data) => {
      // clean the data
      var dataArray = [];
      data.forEach(d => {
        dataArray.push([d.conc, d[sample]]) 
         for (var i in d){
           if (d.hasOwnProperty(i)) {
            d[i] = Number(d[i]);
           }
         }
      }); 
      
      var regressionData = regression('polynomial', dataArray, 3);
      console.log(regressionData);
      // scales 
      var xExtent = d3.extent(data, d => d.conc);
      var xMax = d3.max(data, d => d.conc);
      var xScale = d3.scalePow()
        .domain([-3, 1])
        .range([margin.left, (width/2) - margin.right]);
           
      var yMax = d3.max(data, d => d[sample]);
      var yScale = d3.scaleLinear()
        .domain([0, 20])
        .range([height - margin.bottom, margin.top]);
      
      //Draw the line
      var line = d3.line()
        .x((d) => { return xScale(d[0]); })
        .y((d) => { return yScale(d[1]); });
        //.curve(d3.curveBasis);
      
            //Add line to SVG
      var svg = d3.select('svg');
        svg.append('path')
        .attr('d', line(regressionData.points))
        .attr('stroke', 'blue')
        .attr('fill', 'white');
      
      //Add points
        svg.selectAll("dot")
        .data(data)
        .enter().append("circle")
        .attr("r", 5.5)
        .attr("cx", function(d) { return xScale(d.conc); })
        .attr("cy", function(d) { return yScale(d[sample]); })
            .attr('fill', 'blue');;
      
      //Create x and y axis
      var xAxis = d3.axisBottom()
        .scale(xScale)
        .ticks(5)
      var yAxis = d3.axisLeft()
        .scale(yScale)
        .ticks(5);
      
      //Add axes to SVG
      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>
​
    