28 нояб. 2013 г. · I have a matrix based solution for this, by post-multiplying a permutation matrix to the original one. This changes the position of the elements in original ...

15 дек. 2014 г. · The simplest way of shuffling each column independently could be to loop over the columns and use np.random.shuffle to shuffle each one in place.

23 дек. 2015 г. · I need is to change both the order of rows and columns (1st row to get swapped with 5th row, 1st column to get swapped with 5th column).

29 июн. 2017 г. · I have two given ndarray s, where the matrix mapping contains information, of how row of the matrix mask should be permuted.

9 сент. 2020 г. · There's an incredibly simple way of permuting the columns of a 2d array with numpy like this: array1 = np.array([[11, 22, 33, 44, 55], [66, 77, 88, 99,

12 дек. 2013 г. · Let's say I have an array r of dimension (n, m) . I would like to shuffle the columns of that array. If I use numpy.random.shuffle(r) it shuffles the lines.

27 мар. 2017 г. · Maybe a matter of taste, but I find the following a bit more readable: i, j = np.ogrid[:3, :4] A[pi[..., None], i, j]. Output:

10 июн. 2019 г. · apply_along_axis is essentially just iterate over the 'other' axes. No speed promises. It makes iteration prettier for 3d and larger; does nothing for 2d.

20 мар. 2020 г. · There is a way to randomly permute the columns of a matrix? I tried to use np.random.permutation but the obtained result is not what i need.

26 февр. 2016 г. · You can use numpy.random.shuffle(). This function only shuffles the array along the first axis of a multi-dimensional array.