回答編集履歴
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追記
test
CHANGED
@@ -27,3 +27,37 @@
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[ 3 6 9 12]]
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```
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あるいは
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```Python
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import numpy as np
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a = np.asarray([[1,2,3]]) # 最初から ndim = 2 の行列としておく
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b = np.asarray([[1,2,3,4]])
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print(np.dot(a.T, b))
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```
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**実行結果** [paizaIO](https://paiza.io/projects/O8RzlJSUw_V4EcBEskCMNA)
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```
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[[ 1 2 3 4]
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[ 2 4 6 8]
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[ 3 6 9 12]]
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```
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