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Topic: FFT scaling of array/FFT scaling of differential function
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sam

Posts: 16
Registered: 2/20/13
FFT scaling of array/FFT scaling of differential function
Posted: Mar 4, 2013 11:44 AM
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Hi,

I have a problem with scaling my graphs for FFT functions.

I am currently implementing forced oscillators and the result output is from the following code

[t x] =ode45(@vanderpol, 0:2*pi/100:4000, [0 1]);

This returns the correct output array. When i transform this however the graphs are not scaled- can someone please help?

i used the following code to transform:

fastft= abs(fft(x(1:6000))

I have looked at alot of different forum posts and can't get help with this (i have tried multiple methods) ... can anyone help me?

Thanks in advance.



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