Plot points with the spectra
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I have a set of points and their amplitudes. I want to plot a graph like this (fig bellow) in which amplitudes are plotted as the spectra of every points.
I plot the graph with command:
plot(f,pv,'k.') % f: frequency; pv: phase velocity
Could you help me to impose amplitude to this plot.
Thanks in advance.

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Anudeep Kumar
el 15 de Mayo de 2025
Hey Ductho,
I believe the function ‘scatter’ can help you achieve your goal. The 'scatter' function comes with the option of specifying the circle colors, which can be a single color or an array , like in your case. You can also specify your circles to be filled.
Below is a short snippet on how to:
% Example data (replace with your own)
% f = ...; % Frequency array
% pv = ...; % Phase velocity array
% amp = ...; % Amplitude array
scatter(f, pv, 20, amp, 'filled'); % 20 is the marker size, adjust as needed
colormap(jet); % Choose colormap (e.g., jet, parula, hot, etc.)
colorbar; % Show colorbar
xlabel('Frequency (MHz)');
ylabel('Phase Velocity (km/s)');
title('Amplitude Spectra');
Please refer to the ‘scatter’ documentation to further explore the possibilities and modify your code as per your need
Hope that helps!
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