C. Ng wrote: > Is there a numpy operation that does the following to the array? > > 1 2 ==> 4 3 > 3 4 2 1
How about
>>> a
array([[1, 2],
[3, 4]])
>>> a[::-1].transpose()[::-1].transpose()
array([[4, 3],
[2, 1]])
Or did you mean
>>> a.reshape((4,))[::-1].reshape((2,2))
array([[4, 3],
[2, 1]])
Or even
>>> -a + 5
array([[4, 3],
[2, 1]])
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