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- Sheet:
- (0, 0) ⌐1992 by David Palmer, All rights reserved
- (1, 0) Auto_Open
- (6, 0) FFT is a Fast Fourier Transform. It works on both real and
- (7, 0) imaginary data. The length of the data must be a power
- (8, 0) of 2. The "direction" argument gives the mode, negative
- (9, 0) is inverse, positive is forward, 2 is complex, 1 is real.
- (10, 0) Examples:
- (11, 0) =FFT(A1:B32, -2)
- (12, 0) Takes the 32x2 spectrum A1:B32 and gives a 32x2
- (13, 0) complex result.
- (14, 0) =FFT(A1:B32, -1)
- (15, 0) Takes the 32x2 spectrum and gives a 64x1 real result
- (16, 0) =FFT(A1:A64, 1)
- (17, 0) Takes the 64x1 real numbers and gives a 32x2 spectrum
- (18, 0) =FFT(A1:B32, 2)
- (19, 0) Takes the 32x2 complex numbers gives 32x2 spectrum
- (21, 0) Do not modify and save this file, it contains code resources,
- (22, 0) which EXCEL does not properly preserve.
- (23, 0) Do not rename this file either.
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