javascript - d3和crossfilter js错误

我正试图用DC，D3和交叉滤波器制作一个网页，但是开发人员工具提醒我以下错误。


  未被捕获的ReferenceError：未定义数据

      d3.csv("mydata.csv", function(error, data) {
                                if (error) throw error;
                                console.log(data);
                            });
  var ndx = crossfilter(data);

  var ratingDim = ndx.dimension(function(d) { return d.rating; });
  var total_10 = ratingDim.filter(3);

  function print_filter(filter){
      var f=eval(filter);
      if (typeof(f.length) != "undefined") {}else{}
      if (typeof(f.top) != "undefined") {f=f.top(Infinity);}else{}
      if (typeof(f.dimension) != "undefined") {f=f.dimension(function(d) { return "";}).top(Infinity);}else{}
      console.log(filter+"("+f.length+") = "+JSON.stringify(f).replace("[","[\n\t").replace(/}\,/g,"},\n\t").replace("]","\n]"));
                            }
      print_filter("total_10");

    <script src="https://cdnjs.cloudflare.com/ajax/libs/dc/3.0.3/dc.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/crossfilter/1.3.12/crossfilter.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>


  
            
            
            最佳答案            
            
            
我认为您应该这样处理您的问题：



var data_url = "https://gist.githubusercontent.com/tikeda123/5e7cf7f40ea96a273273729cb6320e12/raw/198db29f442ef3a96b72fb57d72c56eaa8862c09/log.csv"
d3.csv(data_url,
 function(data) {
   var ndx = crossfilter(data);
   /* Continue with your code here */
});

    <script src="https://cdnjs.cloudflare.com/ajax/libs/dc/3.0.3/dc.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/crossfilter/1.3.12/crossfilter.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>


  





对于var ndx = crossfilter(data);，数据未定义（仅在csv第一个回调内部定义）。就像文档（learnjsdata.com/read_data.html）中出现的一样，csv第一个回调有一个参数，而不是两个...
关于javascript - d3和crossfilter js错误，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/50451728/