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å ¨é¨è¶³ããåãã¨ã«è¶³ããã®éãã§ããï½ In [46]: import numpy as np In [47]: A=np.array([[ 2,4,6.], ...: [ 4,8,12.], ...: [ 6,12,18.]]) In [48]: A.sum() Out[48]: 72.0 In [49]: A.sum(1) Out[49]: array([ 12., 24., 36.])
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