Problem isolating and finding out a function maximum value

Hello there. So, I'm having trouble trying to isolate three different functions and obtaining their maximum value. Bellow follows the script I've written, and the graph plotted with the functions I want to obtain the maximum amplitude (functions h, alpha, beta). I tried using Max(abs), but it did not work.

(A lot of lines before this)

% Nonlinear time-varying natural frequencies

omega=abs(compeigs(1:2:end,:));

% Nonlinear time-varying damping ratios

zeta=-real(compeigs(1:2:end,:))./omega;

figure(101)

h=plot(ti(tirange),omega/2/pi,ti(tirange([1 end])),[omega_lin omega_lin]/2/pi,'k--','linewidth',lw,'markersize',ms);

set(get(h(1),'parent'),'fontsize',fs);

xlabel('$t$ (s)')

ylabel('$\omega_n(t_0)$')

legend(h(1:4),{'$h$','$\alpha$','$\beta$','Linear'},'interpreter','latex')

xlim(ti(tirange([1 end])))

grid

figure(102)

h=plot(ti(tirange),zeta,ti(tirange([1 end])),[zeta_lin zeta_lin],'k--','linewidth',lw,'markersize',ms);

set(get(h(1),'parent'),'fontsize',fs);

xlabel('$t$')

ylabel('$\zeta(t_0)$')

legend(h(1:4),{'$h$','$\alpha$','$\beta$','Linear'},'interpreter','latex')

xlim(ti(tirange([1 end])))

grid

Answer 1

[Pratyush]

Hi Lucas,

I understand that you want to obtain the maximum amplitude of the functions you have ploted.

You could extract the values of the functions h, alpha, and beta where they are being defined in your code. After extracting the function values, you can use the "max" function in MATLAB to find the maximum value of each function.

Here's an example of how you might extract the function values and find their maximum values:

% Extracting function values
h_values = omega/2/pi;  % Assuming omega/2/pi represents the function h
alpha_values = ...;  % Extract values for the function alpha
beta_values = ...;   % Extract values for the function beta
    
% Finding maximum values
max_h = max(abs(h_values));
max_alpha = max(abs(alpha_values));
max_beta = max(abs(beta_values));

Hope this helps.