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.. currentmodule:: pywt

Other functions

Integrating wavelet functions

.. autofunction:: integrate_wavelet

The result of the call depends on the wavelet argument:

  • for orthogonal and continuous wavelets - an integral of the wavelet function specified on an x-grid:

    [int_psi, x_grid] = integrate_wavelet(wavelet, precision)
    
  • for other wavelets - integrals of decomposition and reconstruction wavelet functions and a corresponding x-grid:

    [int_psi_d, int_psi_r, x_grid] = integrate_wavelet(wavelet, precision)
    

Central frequency of psi wavelet function

.. autofunction:: central_frequency

.. autofunction:: scale2frequency


Quadrature Mirror Filter

.. autofunction:: qmf

Orthogonal Filter Banks

.. autofunction:: orthogonal_filter_bank


Example Datasets

The following example datasets are available in the module pywt.data:

name description
ecg ECG waveform (1024 samples)
aero grayscale image (512x512)
ascent grayscale image (512x512)
camera grayscale image (512x512)
nino sea surface temperature (264 samples)
demo_signal various synthetic 1d test signals

Each can be loaded via a function of the same name.

.. currentmodule:: pywt.data
.. autofunction:: demo_signal

Example:

>>> import pywt
>>> camera = pywt.data.camera()
>>> doppler = pywt.data.demo_signal('doppler', 1024)
>>> available_signals = pywt.data.demo_signal('list')
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