qdft                    Quantile Discrete Fourier Transform (QDFT)
qdft2qacf               Quantile Autocovariance Function (QACF)
qdft2qper               Quantile Periodogram and Cross-Periodogram
                        (QPER)
qdft2qser               Quantile Series (QSER)
qfa.plot                Quantile-Frequency Plot
qkl.divergence          Kullback-Leibler Divergence of Quantile
                        Spectral Estimate
qper2qcoh               Quantile Coherence Spectrum (QCOH)
qsmooth.qdft            Quantile Smoothing of Quantile Discrete Fourier
                        Transform
qsmooth.qper            Quantile Smoothing of Quantile Periodogram or
                        Spectral Estimate
qspec.lw                Lag-Window Estimator of Quantile Spectrum and
                        Cross-Spectrum (QSPEC)
sqdft                   Spline Quantile Discrete Fourier Transform
                        (SQDFT)
sqr.fit                 Spline Quantile Regression (SQR)
tqr.fit                 Trigonometric Quantile Regression (TQR)
tsqr.fit                Trigonometric Spline Quantile Regression (TSQR)
