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pysteps.utils.spectral.corrcoef

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pysteps.utils.spectral.corrcoef#

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 – The correlation coefficient. Gives the same result as numpy.corrcoef(X.flatten(), Y.flatten())[0, 1].

Return type:

float

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