Question

我目前正在尝试将grouped bar chart示例应用于某些数据。经过转换的数据是

  "data": [
    {
    "name":"carnet",
    "values": [
        {
          "key" : "lit",
          "doc_count" : 10,
          "mat_par_eleve" : {
            "doc_count_error_upper_bound" : 0,
            "sum_other_doc_count" : 0,
            "buckets" : [
              {
                "key" : "jean",
                "doc_count" : 6,
                "moyenne_eleve_matiere" : {
                  "value" : 10.5
                }
              },
              {
                "key" : "toto",
                "doc_count" : 3,
                "moyenne_eleve_matiere" : {
                  "value" : 14.333333333333334
                }
              },
              {
                "key" : "tata",
                "doc_count" : 1,
                "moyenne_eleve_matiere" : {
                  "value" : 6.0
                }
              }
            ]
          }
        },
        {
          "key" : "maths",
          "doc_count" : 10,
          "mat_par_eleve" : {
            "doc_count_error_upper_bound" : 0,
            "sum_other_doc_count" : 0,
            "buckets" : [
              {
                "key" : "tata",
                "doc_count" : 7,
                "moyenne_eleve_matiere" : {
                  "value" : 10.142857142857142
                }
              },
              {
                "key" : "toto",
                "doc_count" : 2,
                "moyenne_eleve_matiere" : {
                  "value" : 14.5
                }
              },
              {
                "key" : "jean",
                "doc_count" : 1,
                "moyenne_eleve_matiere" : {
                  "value" : 10.0
                }
              }
            ]
          }
        },
        {
          "key" : "phy",
          "doc_count" : 5,
          "mat_par_eleve" : {
            "doc_count_error_upper_bound" : 0,
            "sum_other_doc_count" : 0,
            "buckets" : [
              {
                "key" : "toto",
                "doc_count" : 5,
                "moyenne_eleve_matiere" : {
                  "value" : 11.6
                }
              }
            ]
          }
        }
    ],
    "transform": [
      { "type": "project", "fields":["key", "doc_count", "mat_par_eleve"]},
      {"type": "flatten", "fields":["mat_par_eleve.buckets"], "as": ["mat_elev"]},
      { "type": "project", "fields":["key", "doc_count", "mat_elev.key", "mat_elev.doc_count", "mat_elev.moyenne_eleve_matiere"],
        "as":["key", "doc_count", "mat_elev_key", "mat_elev_doc_count", "moy_elev_mat"]},
      { "type": "project", "fields":["key", "doc_count", "mat_elev_key", "mat_elev_doc_count", "moy_elev_mat.value"]}
    ]
    }
  ],

到目前为止，我尝试了以下操作：

将示例更改为make it look more like my plot
从头开始逐步构建a grouped bar chart for my data

这是问题所在：对我来说，我上面给出的两个示例极为相似，我无法找到第一个为什么不显示我的数据，而第二个却正确地显示数据的原因。

有人可以帮我发现差异吗？

Vega中的分组条形图

0 个答案: