How to calculate FTT with a dimension

Questions
1

Hallo,
how can i calculate the FFT with a dimension? Like:

fft(my_list,n) // n = dimension

Thank you very much!

2

Fourier can compute the FFT of an array of arbitrary dimension. See it’s documentation:

http://reference.wolfram.com/mathematica/ref/Fourier.html

3

Thanks but i mean , Y = fft(X,n) with a the n-point DFT, where n is the size of X in the first nonsingleton dimension. ( n = Next power of 2 from length of y)

4

OK i found it :

f=Fourier[PadRight[my_list,n,0.]]
5

I see.

A gentle suggestion: when you post a question, explain it in detail. From your initial post it was not clear wht you were asking.

Best,
David