The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.matlab

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: FFT scaling of array/FFT scaling of differential function
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  

Posts: 16
Registered: 2/20/13
FFT scaling of array/FFT scaling of differential function
Posted: Mar 4, 2013 11:44 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply


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.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.