How would this proposed function compare to using the modulo operator, like 'arr % (2*pi)'?
On Mon, Nov 23, 2020, 16:13 Thomas <thomasbbrun...@gmail.com> wrote: > Hi, > > I have a proposal for a feature and I hope this is the right place to post > this. > > The idea is to have a function to map any input angle to the range of [ 0, > 2*pi ] or [ - pi, pi ]. > > There already is a function called 'unwrap' that does the opposite, so I'd > suggest calling this function 'wrap'. > > Example usage: > # wrap to range [ 0, 2*pi ] > >>> np.wrap([ -2*pi, -pi, 0, 4*pi ]) > [0, pi, 0, 2*pi] > > There is some ambiguity regarding what the solution should be for the > extremes. An example would be an input of 4*pi, as both 0 and 2*pi would be > valid mappings. > > There has been interest for this topic in the community (see > https://stackoverflow.com/questions/15927755/opposite-of-numpy-unwrap). > > Similar functions exist for Matlab (see > https://de.mathworks.com/help/map/ref/wrapto2pi.html). They solved the > ambiguity by mapping "positive multiples of 2*pi map to 2*pi and negative > multiples of 2*pi map to 0." for the 0 to 2*pi case. > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@python.org > https://mail.python.org/mailman/listinfo/numpy-discussion >
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