IFFT Function (CREATE command)

IFFT produces new series based on the inverse Fourier transformation of existing series.

• The only specification on IFFT is the name or names of the existing series in parentheses.
• IFFT needs two existing series to compute each new series. Thus, you must specify two existing series names on the right side of the equation for each new series specified on the left.
• The first existing series specified is the real series and the second series is the imaginary series.
• The existing series cannot have embedded missing values.
• The new series will be twice as long as the existing series. Thus, the last half of each existing series must be system-missing to allow enough room to create the new series.

Example

CREATE C = IFFT(A B).

• This command creates one new series, C, from the series A (real) and B (imaginary).