FFT Example 2: 2D Signal - Teradata Vantage

In this example, the signals are two-dimensional (2D).

Input

The input table has one time sequence of 2D signals of length 4, represented by a 2x2 matrix in the value1 column. The first two value1 values (1, 2) represent the first column of the matrix. The next two value1 values (3, 4) represent the second column of the matrix.

SQL Call

CREATE MULTISET TABLE fft_output2 AS (
  SELECT * FROM FFT (
    ON fft_input2 AS inputtable PARTITION BY id1 ORDER BY timestep
    USING
    ValueColumns ('value1')
    NumDimensions (2)
  ) AS dt
) WITH DATA;

Output