sum():所有的数求和
sum(axis=0):列相加
sum(axis=1):行相加
import numpy as np a=np.array([[1,1,2],[2,2,3],[4,4,3]]) print(a.sum()) print(a.sum(0)) print(a.sum(1))
运行结果:
22 [7 7 8] [ 4 7 11]
sum():所有的数求和
sum(axis=0):列相加
sum(axis=1):行相加
import numpy as np a=np.array([[1,1,2],[2,2,3],[4,4,3]]) print(a.sum()) print(a.sum(0)) print(a.sum(1))
运行结果:
22 [7 7 8] [ 4 7 11]
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