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matlab dft help

evlashevlash Posts: 2Member
Hello I am trying to calculate the n-point DFT of a signal using fft where n=512 and plot it in matlab. The signal is a separate file that I have read into matlab. I am able read and plot the first 512 values of the signal but when I try to get the dft of the signal and plot it the outcome does not look correct. How could I go about achieving this?
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