Howtosignalprocessing
How do you perform a discrete Fourier transform in Matlab?
To plot the magnitude and phase in degrees, type the following commands: f = (0:length(y)-1)*100/length(y); % Frequency vector subplot(2,1,1) plot(f,m) title('Magnitude') ax = gca; ax. XTick = [15 40 60 85]; subplot(2,1,2) plot(f,p*180/pi) title('Phase') ax = gca; ax. XTick = [15 40 60 85];
How do you code DFT?
Then the basic DFT is given by the following formula: X(k)=n−1∑t=0x(t)e−2πitk/n. The interpretation is that the vector x represents the signal level at various points in time, and the vector X represents the signal level at various frequencies.
