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I am particularly talking about the matplotlib's axes.magnitude_spectrum() function that plots the magnitude spectrum. Is this a representation of the discrete Fourier transform?

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  • $\begingroup$ More information required? $\endgroup$ – Laurent Duval Jul 12 at 11:26
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FFT (fast Fourier transform) is an algorithm that implements the discrete Fourier transform, in a fast manner. Both computes a "full spectrum" from a signal, which is generally complex. The amplitude spectrum is, up to minor corrections (scaling of components), the magnitude of the "full spectrum".

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