series_ifft()

Applies to: ✅ Microsoft Fabric ✅ 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