Trying to plot fft,,Please help

My code is :

function RunOsciliation5814

% Solving and ploting the Logistic model with an extra forcing parameter

% dxdt=N0*x*sin(omega*t)*(1-x/K);

N0=2; % The value of the growth rate x0=.1; % The initial condition omega=.5; % The value of osillation parameter t0=0; % The initial value of the time vector tf=200; % The final value in the time vector tspan=t0:tf; % Time vector K=10; % Carrying capacity

% Using ode45 solver to integrate the ODE [t,x]=ode45(@osciliation,[0 200],0.1,[],2,10,.5);

plot(t,x,'*-'); % Plotting Time Vs the population xlabel('t') ylabel('x') title('Time Vs population')

1;

Answer 1

[Salaheddin Hosseinzadeh]

Hi Avan,

I wish you had provided more information about your problem.

I don't see any sign of fft in your code?! I don't really know what's your intention.

But if you just want to make a fft plot of your data, which apparently is x you may use this code I created to facilitate using fft.

It's very simple to use fft, just take a look inside the file and you'll understand how it's done.

All you need is the data and sampling frequency which is defined a Fs I believe.

I'm hoping this helps but let us know if your problem is not solved.

Good Luck