D3 Examples - Planets

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.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 i = 4;
    var width = 960;
    var height = 500;
​
    var svg = d3.select('svg');
    
    for(var i = 0; i < 1389; i++) {
      width = Math.random() * 1000;
      
      var data = {
        x: Math.random() * width,
        y: Math.random() * height,
        radius : Math.random() * 10 + 1,
        width: width
      };
      
      svg.append('circle')
            .datum(data);
    }
    
    // new value
    width = 2000000;
    
    // the last value
    console.log(data);
    
    svg.selectAll('circle')
        .attr('cx', function(jon) {
            console.log(jon);
            return jon.x;
            })
        .attr('cy', function(d) {
            return d.y;
            })
        .attr('r', function(d) {
            return d.radius;
            });
    
    console.log(d3.selectAll('circle'));
  </script>
</body>
​
    