numpy.random.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 |
---|---|
Returns: |
out : ndarray Permuted sequence or array range. |
>>> 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]])
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https://docs.scipy.org/doc/numpy-1.11.0/reference/generated/numpy.random.permutation.html