The easy way to unpad an array is by indexing with slices, e.g., x[20:-4] to undo a padding of [(20, 4)]. Just be careful about unpadding "zero" elements on the right hand side, because Python interprets an ending slice of zero differently -- you need to write something like x[20:] to undo padding by [(20, 0)].
On Mon, Apr 12, 2021 at 1:15 PM Jeff Gostick <jgost...@gmail.com> wrote: > I often find myself padding an array to do some processing on it (i.e. to > avoid edge artifacts), then I need to remove the padding. I wish there > was either a built in "unpad" function that accepted the same arguments as > "pad", or that "pad" accepted negative numbers (e.g [-20, -4] would undo a > padding of [20, 4]). This seems like a pretty obvious feature to me so > maybe I've just missed something, but I have looked through all the open > and closed issues on github and don't see anything related to this. > > > Jeff G > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@python.org > https://mail.python.org/mailman/listinfo/numpy-discussion >
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