HW1 Example 1 Demo

<!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; }
  </style>
</head>

<body>
  <script>
circleRadii = [75, 40, 35]

var svgContainer = d3.select("body").append("svg")
                                    .attr("width", 600)
                                    .attr("height", 200);

var circles = svgContainer.selectAll("circle")
                          .data(circleRadii)
                          .enter()
                          .append("circle")

</script>
</body>

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