Question

我想制作一个包含DC，D3和crossfilter的网页，但开发人员工具会让我想起以下错误。

未捕获的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>

Answer 1

我认为你应该以这种方式处理你的问题：

＆＃13;

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 */ 
});

＆＃13;

    <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>

＆＃13;

未定义var ndx = crossfilter(data);数据（仅在csv第一次回调中定义）。另外，因为它出现在文档（learnjsdata.com/read_data.html）csv中，第一个回调有一个参数，而不是两个......

d3和crossfilter js

1 个答案: