To convert a matrix into an actual signal, the matrix elements can be considered as the magnitude of the signal over time. You can use the "plot" or "stem" function in MATLAB to visualize the signal. Following are the steps to create a magnitude over time signal from the given matrix in MATLAB:
1. Define a time axis for the signal. Depending on the sampling rate, you can determine the time axis as followss
`time_axis = 0:1/fs:(size(mag_matrix, 1)-1)/fs;`
Here, `fs` is the sampling rate of the signal.
2. Plot the signal using the "plot" or "stem" function in MATLAB. For example, using the "stem" function, you can visualize the magnitude over time.
`stem(time_axis, mag_matrix);`
3. Add axis labels, plot title, and legend if desired:
xlabel('Time (s)');
ylabel('Magnitude');
title('Magnitude over time');
legend('Channel 1', 'Channel 2', ..., 'Channel n');
Here, `n` is the number of channels in the input matrix.
Here is an example code snippet that demonstrates these steps
% Define the input matrix
mag_matrix = rand(1000, 5);
% Define the time axis
fs = 1000; % Sampling rate
time_axis = 0:1/fs:(size(mag_matrix, 1)-1)/fs;
% Plot the magnitude over time
stem(time_axis, mag_matrix);
% Add axis labels, plot title and legend
xlabel('Time (s)');
ylabel('Magnitude');
title('Magnitude over time');
legend('Channel 1', 'Channel 2', 'Channel 3', 'Channel 4', 'Channel 5');
This will create a stem plot of the magnitude over time of each channel in the input matrix with the corresponding axis labels and title.
For further reference you can follow the stem function documentation: https://www.mathworks.com/help/matlab/ref/stem.html?searchHighlight=stem&s_tid=srchtitle_stem_1
