Frequency Domain Instructions

Below are the RATS instructions for handling frequency domain and spectral techniques.

CACCUMULATE	Computes partial sums of complex series
CADD	Adds two complex series
CDIVIDE	Divides two complex series
CEXP	Takes the anti-log of a complex series
CLABELS	Assigns labels to complex series
CLN	Takes the log of a complex series
CMASK	Creates a complex seasonal mask
CMULTIPLY	Multiplies one complex series by the complex conjugate of another series
CMVE	Copies entries of complex series
CONJUGATE	Conjugates a complex series
CPRINT	Prints complex series
CSAMPLE	Reduces the number of frequencies of a complex series
CSCALE	Scales a complex series by a constant
CSET	Does general transformations of complex series
CSQRT	Takes the square root of a complex series
CSUBTRACT	Subtracts two complex series
CTOR	Copies (one part) of a complex series into a real-valued series
CXTREMUM	Finds extreme values of a complex series.
FFT	Computes Fourier transforms
FOLD	Folds a spectrum (computes implied spectral density)
FREQUENCY	Initializes frequency domain analysis (required)
IFT	Computes inverse Fourier transforms
POLAR	Computes the polar decomposition of a series
RTOC	Copies real-valued series to complex series
TAPER	Tapers complex series
TRFUNCTION	Computes the transfer function of a lag polynomial
WINDOW	Smooths spectral estimates