numpy累积有两类函数:np.cumxxxxx和np.ufunc.accumulate()

import numpy as np

a = np.arange(1, 5)

print(np.cumprod(a))

print(np.cumsum(a))

print(np.add.accumulate(a))

print(np.multiply.accumulate(a))

b = np.tile(np.arange(1, 5), (4, 1))

print(np.cumsum(b, axis=1))

print(np.multiply.accumulate(b, axis=1))

输出为:

[ 1  2  6 24]

[ 1  3  6 10]

[ 1  3  6 10]

[ 1  2  6 24]

[[ 1  3  6 10]

 [ 1  3  6 10]

 [ 1  3  6 10]

 [ 1  3  6 10]]

[[ 1  2  6 24]

 [ 1  2  6 24]

 [ 1  2  6 24]

 [ 1  2  6 24]]