Your question should have been what is the purpose of FFT in general? Matlab is just a programming/testing environment for mathematical modelling so they provide FFT as a tool. What's important to know is that they use an algorithm called FFTW (Fastest Fourier Transform in the West).Nosheen said:i actually meant to say that whats the purpose of FFT??
is it provide the magnitude of highest frequency component or else...
replies r most welcome