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 aGenerator
instance instead; please see the Quick start.- Parameters:
- xint 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:
- outndarray
Permuted sequence or array range.
See also
random.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]])