dft_real

dft_real(x, inverse=False)

Discrete Fourier transform of real-valued data.

Mirrors the C# Fourier.RealFFT: transforms len(x) real values in place (len(x) must be a power of two) into the positive-frequency half of the complex transform.

Parameters

Name	Type	Description	Default
x	array_like	Real-valued, power-of-two length.	required
inverse	bool	If True, computes the inverse transform of a complex array that is the transform of real data (matching the C# doc comment – multiply by 2/len(x) for the true inverse).	False

Returns

Name	Type	Description
	numpy.ndarray	Same length as x.

Examples

>>> from corehydropy import dft_real
>>> len(dft_real([1, 2, 3, 4]))
4