series_ifft()
Applies the Inverse Fast Fourier Transform (IFFT) on a series.
The series_ifft() function takes a series of complex numbers in the frequency domain and transforms it back to the time/spatial domain using the Fast Fourier Transform. This function is the complementary function of series_fft. Commonly the original series is transformed to the frequency domain for spectral processing and then back to the time/spatial domain.
Syntax
series_ifft(fft_real [, fft_imaginary])
Arguments
- fft_real: Dynamic array of numeric values representing the real component of the series to transform.
- fft_imaginary: A similar dynamic array representing the imaginary component of the series. This parameter is optional and should be specified only if the input series contains complex numbers.
Returns
The function returns the complex inverse fft in two series. The first series for the real component and the second one for the imaginary component.
Example
See series_fft