I think having some function for common cases like moving average and spectrogram would be good. Having a jumping-off point and simple reference for testing against could encourage someone to make a faster implementation down the road. -Todd On Mon, Aug 26, 2019 at 12:24 AM Stephan Hoyer <shoyer@gmail.com> wrote:
I would be very interested to see the “sliding window view” function merged into np.lib.stride_tricks.
I don’t think it makes sense to add a suite of dedicated functions for sliding window calculations that wrap that function. If we are going to go down the path of adding sliding window calculations into a NumPy, they should use efficient algorithms, like those found in the “bottleneck” package.
Best, Stephan
On Sun, Aug 25, 2019 at 3:33 PM Nicholas Georgescu <nsg27@case.edu> wrote:
Hi all,
I opened a Pull Request <https://link.getmailspring.com/link/58478F5E-3390-4C6D-8AA4-0B8724FC079A@getmailspring.com/0?redirect=https%3A%2F%2Fgithub.com%2Fnumpy%2Fnumpy%2Fpull%2F13923&recipient=bnVtcHktZGlzY3Vzc2lvbkBweXRob24ub3Jn> to include this package in numpy <https://link.getmailspring.com/link/58478F5E-3390-4C6D-8AA4-0B8724FC079A@getmailspring.com/1?redirect=https%3A%2F%2Fpypi.org%2Fproject%2Fmvgavg%2F&recipient=bnVtcHktZGlzY3Vzc2lvbkBweXRob24ub3Jn>, along with the associated sliding window function in this PR <https://link.getmailspring.com/link/58478F5E-3390-4C6D-8AA4-0B8724FC079A@getmailspring.com/2?redirect=https%3A%2F%2Fgithub.com%2Fnumpy%2Fnumpy%2Fissues%2F7753&recipient=bnVtcHktZGlzY3Vzc2lvbkBweXRob24ub3Jn> .
The function picks the fastest method to do a moving average if there is no weighting, but with weights it resorts to the second-fastest method which has an easier implementation. It also contains a binning option which cuts the number of points down by a factor of n rather than by subtracting n. The details are in the package documentation and PR.
Thanks, Nicholas [image: Sent from Mailspring] _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@python.org https://mail.python.org/mailman/listinfo/numpy-discussion
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