回答編集履歴
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test
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@@ -3,3 +3,41 @@
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`len(fetures_df.iloc[0, '1']) == len(fetures_df.iloc[0, '2']) == ...`になっている必要があります。
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---
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```python
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a = np.array([np.arange(2), np.arange(3)])
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print(a)
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#[array([0, 1]) array([0, 1, 2])]
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print(a.shape)
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#(2,)
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a = np.array([np.arange(3), np.arange(3)])
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print(a)
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'''
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[[0 1 2]
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[0 1 2]]
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'''
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print(a.shape)
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#(2, 3)
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```
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