Man pages for qfa
Quantile-Frequency Analysis (QFA) of Time Series and Spline Quantile Regression (SQR)

birthweightBirth data
boot.sqrBootstrap of Spline Quantile Regression (SQR) Coefficients
engelEngel's food expenditure data
finIndexFinancial index
perPeriodogram (PER)
qacfQuantile Autocovariance Function (QACF)
qcserQuantile-Crossing Series (QCSER)
qdftQuantile Discrete Fourier Transform (QDFT)
qdft2qacfQuantile Autocovariance Function (QACF)
qdft2qperQuantile Periodogram (QPER)
qdft2qserQuantile Series (QSER)
qfa.plotQuantile-Frequency Plot
qkl.divergenceKullback-Leibler Divergence of Quantile Spectral Estimate
qperQuantile Periodogram (QPER)
qper2Quantile Periodogram Type II (QPER2)
qserQuantile Series (QSER)
qser2arAutoregression (AR) Model of Quantile Series
qser2qacfACF of Quantile Series (QSER) or Quantile-Crossing Series...
qser2sarSpline Autoregression (SAR) Model of Quantile Series
qspec2qcohQuantile Coherence Spectrum
qspec.arAutoregression (AR) Estimator of Quantile Spectrum
qspec.lwLag-Window (LW) Estimator of Quantile Spectrum
qspec.sarSpline Autoregression (SAR) Estimator of Quantile Spectrum
sar.eq.bootstrapBootstrap Simulation of SAR Coefficients for Testing Equality...
sar.eq.testWald Test and Confidence Band for Equality of...
sar.gc.bootstrapBootstrap Simulation of SAR Coefficients for...
sar.gc.coefExtraction of SAR Coefficients for Granger-Causality Analysis
sar.gc.testWald Test and Confidence Band for Granger-Causality Analysis
sqdftSpline Quantile Discrete Fourier Transform (SQDFT) of Time...
sqdft.fitSpline Quantile Discrete Fourier Transform (SQDFT) of Time...
sqrSpline Quantile Regression by Formula
sqr1.fitLinear Spline Quantile Regression with Total-Variation...
sqr3.fitCubic Spline Quantile Regression with L2-Norm Roughness...
sqr_deriv.plotPlot of Derivative of Spline Quantile Regression Coefficients
sqr.fitCubic Spline Quantile Regression with L1-Norm Roughness...
sqr.fit.optimCubic Spline Quantile Regression with L1-Norm Roughness...
sqr.plotPlot of Spline Quantile Regression Coefficients
tqr.fitTrigonometric Quantile Regression (TQR)
tsqr.fitTrigonometric Spline Quantile Regression (TSQR) of Time...
yearssnYearly sunspot numbers v1.0
yearssn2Yearly sunspot numbers v2.0
qfa documentation built on March 30, 2026, 5:07 p.m.