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excel-bar-chart-visualization

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读取多工作表Excel文件，自动处理合并单元格与数据清洗，进行交叉分组统计并生成带总计行的结果表，最后绘制支持中英文字体的美化柱状图，适用于多维度数据汇总与可视化分析。

skills/sn-da-excel-workflow/capability/excel-data-visualization/bar-chart-visualization/SKILL.md

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Nov 3, 2026
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## Skill Steps

> This sub-skill covers one capability of the Excel workflow. For reading/counting/Parquet optimization, see the parent workflow SKILL.md.

### Step1: 数据合并与清洗
```python
combined_df = pd.concat(data_frames, ignore_index=True)

# 数据清洗：使用正则表达式统一命名
if '题型' in combined_df.columns:
    combined_df['题型'] = combined_df['题型'].astype(str).str.replace('判', '判断题', regex=False)

# 处理合并单元格技巧1：前向填充
if '流程描述' in combined_df.columns:
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