回答編集履歴
2
追記
test
CHANGED
@@ -21,3 +21,11 @@
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return "unhappy"
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22
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```
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一行で書くなら、
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```python
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hp2['happy_or_unhappy'] = hp2["Life Ladder"].apply(lambda x: 'happy' if x>=4.5 else 'unhappy')
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```
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1
追記
test
CHANGED
@@ -1 +1,23 @@
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1
1
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hp2["Life Ladder"]がSeriesなので、if文の条件式の中がboolの配列になっています。
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---
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7
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追記
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8
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9
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例えば関数を、
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11
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```python
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def happy_or_unhappy(x):
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if x >= 4.5:
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return "happy"
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else:
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return "unhappy"
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```
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