numpy.random.shuffle打乱顺序函数

shaoheshaohe

numpy.random.shuffle(x)

Modify a sequence in-place by shuffling its contents.

举例

python>>>

>>> arr = np.arange(10)

>>> np.random.shuffle(arr)

>>> arr

[1 7 5 2 9 4 3 6 0 8]

This function only shuffles the array along the first index of a multi-dimensional array（多维矩阵中，只对第一维（行）做打乱顺序操作）:

python>>>

>>> arr = np.arange(9).reshape((3, 3))

>>> np.random.shuffle(arr)

>>> arr

array([[3, 4, 5],

       [6, 7, 8],

       [0, 1, 2]])This function only shuffles the array along the first index of a multi-dimensional array: