Regarding inverse fast fourier transform

[EDIT: Thu May 19 04:44:14 UTC 2011 - Clarify - MKF]

Is it possible to find inverse Fast Fourier Transform of a single fft value?

For example: 3+4i.

CAN I TAKE THE IFFT OF THIS SINGLE FFT VALUE? Minimum how many ifft values should I use for converting those to fft values?

PLEASE HELP ME.

[EDIT: Fri May 20 06:46:31 UTC 2011 - Merged Duplicate - MKF]

I have a set of fft values(4096*4096) total. I have to perform some operations on this.

Finally after performing all the operations the result I'm getting is a single fft value in the form of COMPLEX NUMBER.

Now I want to find the ifft of this single COMPLEX value. Is it possible? If yes please suggest me how to do this.

Answer 1

[Matt Fig]

Sure, why not:

V = 3+4i;
F = fft(V)
I = ifft(F)

EDIT In response to the new details.

Did you try to take the IFFT of the complex number, as I did above? I think it is clear that something else is going on in your code...

Answer 2

[Harsha Vardhan Rao Avunoori]

Well if you just want to find ifft @Matt Fig has already answered your question but are you sure that after performing fft on 4096 x 4096 matrix your result is just a single complex number ???