1.1 - 8.10 - FFT 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 FFT.
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.
Default: 224. 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.
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.
Default: 'true'. 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.
RealValuedSignal
[Optional] Specify whether the value columns contain DOUBLE PRECISION values.
Default: 'true'. If you specify 'false', the function interprets the values as complex numbers; therefore, they must be multiples of two.