javascript - Sunburst Chart - 添加额外的数据层

Question

我正在学习本教程:

https://bl.ocks.org/denjn5/3b74baf5edc4ac93d5e487136481c601

它工作正常，但只有两个“环”数据。我想补充第三个。它使用以下数据从 data.json 文件中提取数据:

{

    "name": "TOPICS", "children": [{
        "name": "Topic A",
        "children": [{"name": "Sub A1", "size": 5, "text": "A story", "sentiment": 1, "source": "dictionary"},
            {"name": "Sub A2", "size": 5, "text": "A note", "sentiment": 0.5, "source": "dictionary"}]
    }, {
        "name": "Topic B",
        "children": [{"name": "Sub B1", "size": 5, "text": "A vignette", "sentiment": 1, "source": "newspaper"},
            {"name": "Sub B3", "size": 5, "text": "A joke", "sentiment": 0.5, "source": "email"}]
    }, {
        "name": "Topic C",
        "children": [{"name": "Sub A1", "size": 5, "text": "A narrative", "sentiment": 1, "source": "newspaper"},
            {"name": "Sub A2", "size": 5, "text": "A chronology", "sentiment": 0.5, "source": "email"}]
    }]
}

我的问题是，如何在外部添加第三个数据环？这似乎是 JSON 格式，但我无法理解它。

Answer 1

鉴于您共享的特定 bl.ocks，您需要做的就是在您希望成为新层父级的项目中创建一个 children 数组，并删除 size 父属性:

例如，在 Sub A1 中创建一个新层:

{
    "name": "TOPICS",
    "children": [{
        "name": "Topic A",
        "children": [{
            "name": "Sub A1",
            "text": "A story",
            "sentiment": 0.8,
            "source": "dictionary",
            "children": [{
                "name": "New Layer 1",
                "size": 5,
                "text": "A story",
                "sentiment": 0.8,
                "source": "dictionary"
            },{ 
            ...etc
            }]
        }, {
            "name": "Sub A2",
            "size": 5,
            "text": "A note",
            "sentiment": 0.3,
            "source": "dictionary"
        }]
    },{
    ...etc
    }]
}

我只是复制/粘贴到这里...当然，您必须相应地调整值。

这是更新的 bl.ocks:https://bl.ocks.org/GerardoFurtado/7c30efbc20232abda294cd71a959c79d/f211ca864503860dfa181c5e9e142e38897abb56