pysteps.utils.spectral.corrcoef¶
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pysteps.utils.spectral.
corrcoef
(X, Y, shape, use_full_fft=False)¶ Compute the correlation coefficient between two-dimensional arrays in the spectral domain.
Parameters: - X : array_like
A complex array representing the Fourier transform of a two-dimensional array.
- Y : array_like
A complex array representing the Fourier transform of a two-dimensional array.
- shape : tuple
A two-element tuple specifying the shape of the original input arrays in the spatial domain.
- use_full_fft : bool
If True, X and Y represent the full FFTs of the original arrays. Otherwise, they are assumed to contain only the symmetric part, i.e. in the format returned by numpy.fft.rfft2.
Returns: - out : float
The correlation coefficient. Gives the same result as numpy.corrcoef(X.flatten(), Y.flatten())[0, 1].