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Vectorized utility functions: abs2, unit phasor, others?
See original GitHub issueDescription
It would be useful to have an efficient function for getting magnitude-squared (power) from real or complex variables. This came up in offline discussion of #742 , where abs is doing unnecessary work if we actually want power anyway.
This could be efficiently accomplished by using numba.vectorize to make a ufunc out of x * x.conj().
Issue Analytics
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- Created 5 years ago
- Reactions:2
- Comments:20 (20 by maintainers)
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A quick list of places where
abs2would be useful:autocorrelatehttps://github.com/librosa/librosa/blob/25538adb3aed3485a06e60b6dad88be3d540f0c2/librosa/core/audio.py#L848rmshttps://github.com/librosa/librosa/blob/25538adb3aed3485a06e60b6dad88be3d540f0c2/librosa/feature/spectral.py#L948-L961icqthttps://github.com/librosa/librosa/blob/25538adb3aed3485a06e60b6dad88be3d540f0c2/librosa/core/constantq.py#L717update: we have a PR! 🎉 https://github.com/scipy/scipy/pull/15390