遇到D3规模和数据绑定问题

Question

我附上了小提琴，里面有JSON，JS，CSS，HTML- https://jsfiddle.net/mihirchronicles/f9mjqwoa/。目标是使用D3显示给定日期的比特币循环（体积）的低，中和高范围。此外，显示总循环并显示每年的循环。我在D3上绑定数据和缩放时遇到问题。任何帮助都会很棒！

var width = 940, //width
      height = 600, //height
      tooltip = new CustomTooltip("bitcurve_tooltip", 240), //tooltip
      layout_gravity = -0.01, //gravity
      damper = 0.1, //moving around nodes
      nodes = [], //empty nodes
      //these will be set in create_nodes and create_vis
      vis = null, 
      force = null, 
      circles = null, 
      radius_scale = null;
      range,
      lowRange,
      aveRange,
      highRange;
 //defining the center based on width and height
  var center = {x: width / 2, y: height / 2}; 

 //defining the area for all the years when split
  var year_centers = {
      "2011": {x: width / 3, y: height / 2},
      "2012": {x: width / 2, y: height / 2},
      "2013": {x: 2 * width / 3, y: height / 2}
    };