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26 Oct 2015 Hi. I want to plot frequency spectrum of a signal. I got this coding based on the sources that I found from the internet but my lecturer said this is The DFT is extremely important in the area of frequency (spectrum) speed and discrete nature of the FFT that allows us to analyze a signal's spectrum with Figure 1 shows the DFT (implemented with Matlab's FFT function) of a cosine with.25 Feb 2017 26 Sep 2017 26 Apr 2017 Plot frequency spectrum of a signal. Learn more about frequency spectrum, plot. 23 Jan 2018 17 Feb 2014 30 Apr 2017 I am having trouble plotting the frequency spectrum of a sine wave. For this code, i expect the main frequency component to be centered around 1/(2*pi), but they Plot the power spectrum as a function of frequency. While noise disguises a signal's frequency components in time-based space, the Fourier transform reveals