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Classe « Generator »

Méthode numpy.random.Generator.shuffle

Signature de la méthode shuffle

def shuffle(self, x, axis=0) 

Description

help(Generator.shuffle)

        shuffle(x, axis=0)

        Modify an array or sequence in-place by shuffling its contents.

        The order of sub-arrays is changed but their contents remains the same.

        Parameters
        ----------
        x : ndarray or MutableSequence
            The array, list or mutable sequence to be shuffled.
        axis : int, optional
            The axis which `x` is shuffled along. Default is 0.
            It is only supported on `ndarray` objects.

        Returns
        -------
        None

        See Also
        --------
        permuted
        permutation

        Notes
        -----
        An important distinction between methods ``shuffle``  and ``permuted`` is 
        how they both treat the ``axis`` parameter which can be found at 
        :ref:`generator-handling-axis-parameter`.

        Examples
        --------
        >>> rng = np.random.default_rng()
        >>> arr = np.arange(10)
        >>> arr
        array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
        >>> rng.shuffle(arr)
        >>> arr
        array([2, 0, 7, 5, 1, 4, 8, 9, 3, 6]) # random

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

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

        

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