Hi, On Mon, Jul 10, 2017 at 3:20 PM, <paul.carr...@free.fr> wrote:
> Dear All > > I'm looking in a way to reshape a 2D matrix into a 3D one ; in my example > I want to *move the columns from the 4th to the 8th in the 2nd plane* (3rd > dimension i guess) > > a = np.random.rand(5,8); print(a) > > I tried > > a = p.reshape(d, (2,5,4), ) but it is not what I'm expecting > > > Nota : it looks like the following task (while I want to split it in 2 > levels and not in 4), but I've not understood at all > > https://stackoverflow.com/questions/31686989/numpy- > reshape-and-partition-2d-array-to-3d > Is this what you are looking for: import numpy as np a= np.arange(40).reshape(5, 8) a Out[]: array([[ 0, 1, 2, 3, 4, 5, 6, 7], [ 8, 9, 10, 11, 12, 13, 14, 15], [16, 17, 18, 19, 20, 21, 22, 23], [24, 25, 26, 27, 28, 29, 30, 31], [32, 33, 34, 35, 36, 37, 38, 39]]) np.lib.stride_tricks.as_strided(a, (2, 5, 4), (16, 32, 4)) Out[]: array([[[ 0, 1, 2, 3], [ 8, 9, 10, 11], [16, 17, 18, 19], [24, 25, 26, 27], [32, 33, 34, 35]], [[ 4, 5, 6, 7], [12, 13, 14, 15], [20, 21, 22, 23], [28, 29, 30, 31], [36, 37, 38, 39]]]) Regards, -eat > > Thanks for your support > > > Paul > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@python.org > https://mail.python.org/mailman/listinfo/numpy-discussion > >
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