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この章のゴール（今日できること） VSTACK/HSTACKの使い分けができる 月別・担当別・店舗別の統合を関数で回せる 列ズレ（不足列・余計な列）を吸収する考え方が分かる 実務演習：月別CSVを“通しデータ”にして集計の土台を作れる ...

Python (Numpy) Interview Questions 1. Discuss vectorisation in NumPy? 2. How to perform visualisation using NumPy? 3. Discuss uses of vstack() and hstack() functions? 4. How is vectorisation different ...

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