randomstate.prng.mt19937.permutation(x)¶Randomly permute a sequence, or return a permuted range.
If x is a multi-dimensional array, it is only shuffled along its first index.
| Parameters: | x (int or array_like) – If x is an integer, randomly permute np.arange(x).
If x is an array, make a copy and shuffle the elements
randomly. |
|---|---|
| Returns: | out – Permuted sequence or array range. |
| Return type: | ndarray |
Examples
>>> np.random.permutation(10)
array([1, 7, 4, 3, 0, 9, 2, 5, 8, 6])
>>> np.random.permutation([1, 4, 9, 12, 15])
array([15, 1, 9, 4, 12])
>>> arr = np.arange(9).reshape((3, 3))
>>> np.random.permutation(arr)
array([[6, 7, 8],
[0, 1, 2],
[3, 4, 5]])