phase as a function of frequency in matlab

To calculate the phase of a signal as a function of frequency in MATLAB, you can use the angle function. First, you need to obtain the Fourier transform of the signal using the fft function. Then, you can use the angle function to obtain the phase of the Fourier coefficients. Here's an example code:

main.m
function [freq, phase] = phase_vs_freq(signal, Fs)
% signal: input signal
% Fs: sampling frequency

N = length(signal); % length of signal
Y = fft(signal); % Fourier transform
f = Fs*(0:(N/2))/N; % frequency range
P = angle(Y(1:N/2+1)); % phase

freq = f;
phase = P;
end
271 chars
13 lines

You can call this function with your signal and the sampling frequency, and it will return the frequency range and the corresponding phase values.