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you have seen now in many videos so far in this section that the frequency resolution so the number of frequency points that you get corresponds to the number of time points in the signal so we saw that with the loop in the Fourier transform the loop that goes over the different frequencies and computes the dot product with the signal and you also saw that a few videos ago with the explanation of the perfection of the Fourier transform and why we need to have n frequencies each corresponding to n time points in order to get an N by n square matrix that is invertible okay so now Im going to talk in this video about modifying the frequency resolution when you need to and thats done through something called zero petting so this is just a brief reminder that the number of frequencies the number of sine waves that we construct in the Fourier transform is a product of N or is determined by n where n is the length of the signal this is the number of time points you have in your signal and