I was reading Practical Introduction to Frequency Domain Analysis . It shows how to observe the frequency content of a signal using this code:
Fs = 44100;
y = audioread('guitartune.wav');
NFFT = length(y);
Y = fft(y,NFFT);
F = ((0:1/NFFT:1-1/NFFT)*Fs).';
magnitudeY = abs(Y); % Magnitude of the FFT
phaseY = unwrap(angle(Y)); % Phase of the FFT
helperFrequencyAnalysisPlot1(F,magnitudeY,phaseY,NFFT)
The function that plots is the helperFrequencyAnalysisPlot1
. I need to know how the function does the plotting but the article never shows how. How is it actually done?
These are Matlab built-in examples so you have to type in the Command Window
edit('helperFrequencyAnalysisPlot1.m')
A new Matlab editor tab will pop up, showing you the function (both its definition and the code).
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