Hi Samantha,
From the information shared, I could infer that you want to plot maximum gain versus frequency from the antenna magnitude data. As shown in the attached image, frequency is a 1-D array and magnitude is a 2-D matrix where each column corresponds to a frequency. To plot maximum gain versus frequency, the first step would be to convert the magnitude values to decibels, then use MATLAB's "max" function on every column to find maximum gain at each frequency and finally using the "plot" function to visualise the plot required.
Please follow the below-mentioned example MATLAB code to plot max gain versus frequency:
% Generating fake data for demonstration
frequency = linspace(1e9, 10e9, 100); % Frequency array (1 GHz to 10 GHz)
azimuth = linspace(0, 360, 36); % Azimuth array (0° to 360°)
magnitude = rand(size(azimuth, 2), size(frequency, 2)) * 20; % Random magnitude values (between 0 and 20)
% Convert magnitude to dB
gainInDB = 10 * log10(magnitude);
% Calculate max gain for each frequency
maxGain = max(gainInDB, [], 1);
% Plot max gain vs. frequency
figure;
plot(frequency, maxGain, 'b', 'LineWidth', 2);
xlabel('Frequency (Hz)');
ylabel('Max Gain (dB)');
title('Max Gain vs Frequency');
grid on;
For more information on the "max" function, please follow this MATLAB R2024a documentation link: https://www.mathworks.com/help/matlab/ref/max.html
I hope this helps!
