# numpy.random.RandomState.permutation

method

random.RandomState.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.

  Note

  New code should use the `permutation` method of a `default_rng()` instance instead; please see the Quick Start.

  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.

  See also

  `Generator.permutation`

    which should be used for new code.

  Examples

      >>> np.random.permutation(10)
      array([1, 7, 4, 3, 0, 9, 2, 5, 8, 6]) # random

      >>> np.random.permutation([1, 4, 9, 12, 15])
      array([15,  1,  9,  4, 12]) # random

      >>> arr = np.arange(9).reshape((3, 3))
      >>> np.random.permutation(arr)
      array([[6, 7, 8], # random
             [0, 1, 2],
             [3, 4, 5]])

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