从右到左计算反向累积乘积

Question

我有以下代码可以正常工作：

import numpy as np

def transformation(C):
    # Transform  0 and 1 to -1 and +1.
    V = 2. * C - 1

    # Compute the cumulative product from left to right
    V = np.cumprod(V, dtype=np.int8)

    return V

C = np.random.choice(np.array([0, 1], dtype=np.int8), size=(3,))
C = transformation(C)

如您所见，np.cumprod从左到右执行累积乘积。我该如何从右向左反转呢？

Answer 1

您应该反转数组，例如V = V [::-1]