On 12/01/15 at 06:47pm, Peter Otten wrote: > Extract 2D arrays: > > >>> a[:,2,3] > array([[ 55, 56, 57, 58, 59], > [115, 116, 117, 118, 119]]) > >>> a[1,:,2] > array([[ 70, 71, 72, 73, 74], > [ 90, 91, 92, 93, 94], > [110, 111, 112, 113, 114]])
The first one is equivalent to a[:, 2, 3, :], which is perhaps clearer in this context: you are singling out row 2 in axis 1, and row 3 in axis 2, and taking everything from axes 0 and 3. Mutatis mutandis with the second example and a[1, :, 2, :], which is different from a[1, :, :, 2], etc. Manolo -- https://mail.python.org/mailman/listinfo/python-list
