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category-statistics

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提取指定类别列并统计各类别数量与占比，生成高分辨率的柱状图、饼图等组合可视化报告，适用于分类数据的分布情况分析。

skills/sn-da-excel-workflow/capability/excel-data-statistics/category-statistics/SKILL.md

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Nov 9, 2026

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## Skill Steps

Step1 提取目标类别数据，清洗无效标签，并统计各类别数量与占比。
```python
import pandas as pd

def calculate_distribution(data, target_col='类别'):
    # 检查目标列是否存在
    if target_col not in data.columns:
        raise ValueError(f'未找到指定的类别字段: {target_col}')
    
    # 提取数据，清洗无效标签（如'--'、'代码'等占位符）
    category_data = data[target_col].dropna().replace(['--', '代码'], pd.NA).dropna()
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