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invfft
Format: invfft( list )
Arguments: [num] list Input data points in the
frequency domain
Returns: [num] Inverse Fast Fourier Transform of the
data in list
Description: Invfft performs an inverse Fourier
transform on the data in list. That is, invfft
reconstructs the time-series data used to create list
using the fft primitive.
For best performance, the number of data points in list
should be a power of 2 (e.g., 2, 4, 8, 16, 32, 64, 128. 256, etc.
). If the number of data points is anything other than a power of
two, invfft uses a combination of Fast Fourier Transform
and Discrete Fourier Transform algorithms.
Examples: invfft(Data) = Returns
the Inverse Fourier transform of the information in Data
invfft(fft(Data)) = Data
See Also: fft
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