fft window

hi, the fft can be calculated with sevral windows (the step function,gaousian ext.) how can i choose what window the program uses in order to calculate the fft? is it the same for ifft as well? thank you.

Answer 1

[Wayne King]

You cannot choose it inside of fft(). What you do is multipy the data by the window before you use fft()

   x = randn(1e3,1);
   x = x.*hamming(1e3);
   xdft = fft(x);