1.1 - 8.10 - IFFT Syntax Elements - Teradata Vantage

Teradata Vantage™ - Machine Learning Engine Analytic Function Reference

Product
Teradata Vantage
Release Number
1.1
8.10
Release Date
October 2019
Content Type
Programming Reference
Publication ID
B700-4003-079K
Language
English (United States)
TargetColumns
Specify the names of one to 16 InputTable columns that contain the signal values on which to perform IFFT.
Dimensions
[Optional] Specify the number of dimensions in the signal. The parameter dimensions must be the INTEGER value 1, 2, or 3. (A time series has one dimension; an image has two or three.)
Default: 1
MaxSignalLength
[Optional] Specify the maximum signal length. The parameter FFT_length must be an INTEGER. If the signal length exceeds FFT_length, the function truncates it to FFT_length.
In a signal with more than one dimension, each dimension must have the same length.
Default: 224
OutputPolarCoordinates
[Optional] Specify whether to output polar coordinates—(magnitude, phase).
Default: 'false'
InputPolarCoordinates
[Optional] Relevant only if RealValuedSignal is 'true'. Specify whether to read complex numbers as polar coordinates—(magnitude, phase).
Default: 'false'
PadSignal
[Optional] Specify whether to pad the input signal with zeros to round up to the closest power of two. If you specify 'false', the function truncates the input signal and rounds down to the closest power of 2 dimensions that is less than the input signal.
Default: 'true'
RealValuedSignal
[Optional] Specify whether the value columns contain DOUBLE PRECISION values. If you specify 'false', the function interprets the values as complex numbers; therefore, they must be multiples of two.
Default: 'true'