Arguments - Aster Analytics

Teradata Aster Analytics Foundation User Guide

Product
Aster Analytics
Release Number
6.21
Published
November 2016
Language
English (United States)
Last Update
2018-04-14
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kiu1466024880662.ditamap
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AA-notempfilter_pdf_output.ditaval
dita:id
B700-1021
lifecycle
previous
Product Category
Software
Argument Category Description
InputTable Required Specifies the name of the table that contains the input data.
OutputTable Optional Specifies the name for the output table that the function creates. The default name is output_table.
OverwriteOutput Optional Specifies whether to overwrite output_table, if it exists. The default value is 'false'.
TimeColumn Required Specifies the name of the input table column that contains the time series.
ValueColumn Required Specifies the name of the input table column that contains the data point values.
SaxWindowSize Required Specifies the SAX2 argument WindowSize, which specifies the size of the sliding window. The window_size must be an INTEGER in the range [1, 1000000].
SaxSymbolsPerWindow Optional Specifies the SAX2 argument SymbolsPerWindow, which specifies the number of SAX code symbols to generate from a window. The symbols_per_window must an INTEGER in the range [1, 1000000]. If symbols_per_window is greater than window_size, the function changes symbols_per_window to window_size. By default, symbols_per_window is the same as window_size.
SaxOutputFrequency Optional Specifies the SAX2 argument OutputFrequency, which specifies the number of data points to skip between successive sliding windows. The gap_between_windows must be an integer in the range [1, 1000]. The default value is 1. A smaller value increases accuracy (the chance of distinguishing time series from each other) at the cost of higher execution time.
ID Required Specifies the name of the input table column that contains the unique identity of a time series.
RandomProjections Optional Specifies the number of iterations required for random masking of SAX words during u_shapelets selection. The projections must be an INTEGER in the range [1, 30]. The default value is 10.

Specifying a greater projections for a longer input time series increases the probability of identifying better u_shapelets at the cost of higher execution time.

Threshold Optional Specifies the value at which an iteration stops and the function stops. The iteration i ends when score iscore i-1 is less than threshold. The threshold must be a DOUBLE PRECISION value in the range (0, 1). The default value is 0.5.
MaxNumIter Optional Specifies the number of iterations at which the function stops. The max_iterations must be an INTEGER in the range [1, 50]. The default value is 10.
ShapeletCutOff Optional Specifies the percentage of u-shapelets to use. The cut_off must be a DOUBLE PRECISION value in the range (0, 1]. The default value is 0.1 (10%).