# Other functions

## Integrating wavelet functions

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

## Quadrature Mirror Filter

## Orthogonal Filter Banks

## 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)

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

Example: .. sourcecode:: python

    >>> import pywt
    >>> camera = pywt.data.camera()