series_ifft()
Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
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])
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| fft_real | dynamic |
✔️ | An array of numeric values representing the real component of the series to transform. |
| fft_imaginary | dynamic |
An array of numeric values representing the imaginary component of the series. This parameter 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