Can any one help me , i need an algorithm of the fast fourier transform without using fft function .

Huh?? Do you want to elaborate on this? The algorithm is embedded in the function, but naturally matlab doesn't provide source for you. Have you tried Googling this yet? :-)

BTW, we don't do your homework for you. Work it out, and post the code here. We will then be much more amenible to helping you fix your logic problems...

Yeah, Matlab provides the full source code as well as the algorithms/equations used for FFT.

Open('fft')

edit fft

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.