Package: qfa
Type: Package
Title: Quantile-Frequency Analysis (QFA) of Time Series
Version: 4.2
Date: 2025-09-10
Authors@R: c(
	person("Ta-Hsin", "Li", role = c("cre","aut"), email = "thl024@outlook.com")
	)
Maintainer: Ta-Hsin Li <thl024@outlook.com>
Description: Quantile-frequency analysis (QFA) of time series based on trigonometric quantile regression. 
 Spline quantile regression (SQR) for regression coefficient estimation.
 References:
    [1] Li, T.-H. (2012) "Quantile periodograms," Journal of the American Statistical
        Association, 107, 765–776, <doi:10.1080/01621459.2012.682815>.
    [2] Li, T.-H. (2014) Time Series with Mixed Spectra, CRC Press, <doi:10.1201/b15154>
    [3] Li, T.-H. (2022) "Quantile Fourier transform, quantile series, and nonparametric
        estimation of quantile spectra," <doi:10.48550/arXiv.2211.05844>.
    [4] Li, T.-H. (2024) "Quantile crossing spectrum and spline autoregression
         estimation," <doi:10.48550/arXiv.2412.02513>.
    [5] Li, T.-H. (2024) "Spline autoregression method for estimation of quantile spectrum,"
        <doi:10.48550/arXiv.2412.17163>.
    [6] Li, T.-H., and Megiddo, N. (2025) "Spline quantile regression," 
        <doi:10.48550/arXiv.2501.03883>.
Depends: R (>= 3.5)
Imports: RhpcBLASctl, doParallel, fields, foreach, mgcv, nlme,
        parallel, quantreg, splines, stats, graphics, colorRamps, MASS
License: GPL (>= 2)
URL: https://github.com/IBM/qfa, https://github.com/thl2019/QFA
NeedsCompilation: yes
Encoding: UTF-8
RoxygenNote: 7.3.3
Packaged: 2025-09-11 02:46:57 UTC; thl
Author: Ta-Hsin Li [cre, aut]
Repository: CRAN
Date/Publication: 2025-09-11 05:40:02 UTC
Built: R 4.5.1; x86_64-w64-mingw32; 2025-10-06 02:29:16 UTC; windows
Archs: x64
