FFT filter - clean your signals and display results!

Perform Fourier transform, filter in frequency domain, reconstruct the signal.

Description

The function introduces the implementation of fft and ifft in filtering and cleaning of signals.
The function plots
1. the original signal,
2. its transform,
3. the reconstructed (filtered) signal.
You can control the filtering by giving your parameters.
Comprehensive help is included (>>help fftf).
The code is extensively commented.

• MATLAB release: MATLAB 7.8 (R2009a)
• Other requirements: Useful as tutorial and introduction to the field.

[Alireza Keramat]

Very well written. Thanks a lot. It helped me so much.

[Craig Doolittle]

I changed line 56 from:
X=X(1:N)/max(X);
to:
X=X(1:N)*N;
in order to return original scaling

This file saved me some time writing my own, thank you very much!

[Saud]

anybody help to run this code.

[Pat]

Well written code. The commenting on the lines is very much appreciated making it easier for the user to follow. Thank you very much!!