numpy.random.Generator.permutation¶
method
-
Generator.
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 : ndarray
Permuted sequence or array range.
Examples
>>> rng = np.random.default_rng() >>> rng.permutation(10) array([1, 7, 4, 3, 0, 9, 2, 5, 8, 6]) # random
>>> rng.permutation([1, 4, 9, 12, 15]) array([15, 1, 9, 4, 12]) # random
>>> arr = np.arange(9).reshape((3, 3)) >>> rng.permutation(arr) array([[6, 7, 8], # random [0, 1, 2], [3, 4, 5]])