7.00.02 - FFT Arguments - Aster Analytics

Teradata Aster® Analytics Foundation User GuideUpdate 2

Aster Analytics
Release Number
Release Date
September 2017
Content Type
Programming Reference
User Guide
Publication ID
English (United States)
Specifies the names of one to 16 inputtable columns that contain the signal values on which to perform FFT.
[Optional] Specifies 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.
[Optional] Specifies 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.
[Optional] Specifies whether to output polar coordinates—(magnitude, phase). Default: 'false'.
[Optional] Relevant only if IsSignalRealValued is 'true'. Specifies whether to read complex numbers as polar coordinates—(magnitude, phase). Default: 'false'.
[Optional] Specifies 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.
[Optional] Specifies whether the value columns contain REAL (DOUBLE PRECISION) values. Default: 'true'. If you specify 'false', the function interprets the values as complex numbers; therefore, they must be multiples of two.