cogpy.spectral.specx

Spectral transforms with xarray interface.

This module wraps core spectral functions from cogpy.spectral (psd.py, multitaper.py, bivariate.py) to work seamlessly with xarray.DataArray, preserving coordinates, dimensions, and metadata.

Convention

• Input: xr.DataArray with a time dimension

• Output: xr.DataArray with a freq dimension (or freq``×``time for spectrograms)

• Preserves all non-time dimensions and coordinates that do not depend on time

• Uses SciPy/NumPy/Ghostipy backends via cogpy.spectral

Status

STATUS: ACTIVE Reason: xarray interface for spectral analysis to match filtering.py pattern Superseded by: n/a Safe to remove: no

Functions

coherencex(sigx, sigy, *[, axis, NW, nfft, ...])	Multitaper magnitude squared coherence between two signals.
normalize_spectrogram(spec, *[, method, dim])	Normalize a spectrogram along a dimension.
psdx(sigx, *[, axis, method, bandwidth, ...])	Power spectral density with xarray interface.
spectrogramx(sigx, *[, axis, bandwidth, ...])	Multitaper spectrogram (time-frequency representation).