回答編集履歴
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あ
answer
CHANGED
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@@ -11,7 +11,7 @@
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11
11
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sums = []
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12
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for label in np.unique(x):
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sums.append(y[x == label].sum())
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14
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-
print(sums)
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14
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+
print(sums) # [0, 9, 0, 15, 0]
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15
15
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```
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## 方法2
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