plot average spectra of multiple values in matlab

Assume you have a matrix X with size MxN where M is the number of frequency points and N the number of spectra to average. You can plot the average spectra in Matlab using the following code:

main.m
% Compute the average spectra
Y = mean(X, 2);

% Plot the spectra
figure;
plot(Y);
title('Average Spectra');
xlabel('Frequency Points');
ylabel('Magnitude');
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The mean function is used to compute the average spectra across the second dimension of the matrix X, which corresponds to the multiple spectra. The resulting vector Y has size Mx1 and contains the average spectra.

Then, we plot the vector Y using the plot function. The title, xlabel, and ylabel functions are used to add labels to the plot.

You can also specify the frequency range of the spectra by providing a vector of M frequency points. For example:

main.m
% Define the frequency range
f = linspace(0, 1000, M);

% Plot the spectra with frequency axis
figure;
plot(f, Y);
title('Average Spectra');
xlabel('Frequency (Hz)');
ylabel('Magnitude');
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Here, we use the linspace function to create a vector of M linearly-spaced frequency points between 0 and 1000 Hz. We then plot the spectra Y against the frequency vector f, and add labels to the plot as before.