VisActor/VChart

[Documentation] 教程文档 -> 图表概念 -> 数据 -> DataSet，示例的运行结果和实际不一致

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#3,593 opened on Dec 23, 2024

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docsgood first issue

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Documentation Title or Section

教程文档

Issue Description or Suggestion

// 注册 merge transform
dataSet.registerTransform('mergeDataView', mergeTransform);
// 使用 merge transform 合并数据
dataViewMerge.transform({ type: 'mergeDataView' });

/**
 * 至此，dataViewMerge 数据处理已经完成了。
 * 最终数据的内容如下
  [
    { year: '1990', group: '18-34', value: 16.9 },
    { year: '1990', group: '35-49', value: 12.2 },
    { year: '1991', group: '18-34', value: 17 },
    { year: '1991', group: '35-49', value: 17.8 },
    { year: '1993', group: '18-34', value: 26.5 },
    { year: '1993', group: '35-49', value: 23.8 },
    { year: '1990', group: '50-64', value: 10.2 },
    { year: '1990', group: '65+', value: 5.2 },
    { year: '1991', group: '50-64', value: 10 },
    { year: '1991', group: '65+', value: 4.8 },
    { year: '1993', group: '50-64', value: 16.8 },
    { year: '1993', group: '65+', value: 6.6 }
  ]
*/

csvParser不会把value里的数据类型转化为number类型 后面经过statistics transform转化后，结果数据下面这样的数据结构，和示例代码中的预期不符

[{
    group: "1990",
    avg: 11.125,
    max: 16.9,
    min: 5.2,
    average: 11.125,
    sum: 44.5,
  }, {...}]

Contributor guide

Tech stack
typescript
Domain
documentation
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic knowledge of VChart data transforms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
85
Research direction
The issue is that the documentation example for DataSet's merge transform shows an expected output that differs from the actual output due to csvParser not converting value types to numbers. To fix, locate the relevant documentation file (likely under tutorials/chart concept/data/dataset), run the example code to capture the actual output after the statistics transform, and update the commented expected output to match the real results. Check the library's behavior with a simple test to confirm.