Package: Qapprox
Type: Package
Title: Approximation to the Survival Functions of Quadratic Forms of
        Gaussian Variables
Version: 0.2.1
Authors@R: c(
    person("Hong", "Zhang", role = "aut"),
    person("Judong", "Shen", role = "aut"),
    person("Zheyang", "Wu", email = "zheyangwu@wpi.edu", role = c("aut", "cre")))
Description: Calculates the right-tail probability of quadratic forms of Gaussian variables
    using the skewness-kurtosis ratio matching method, modified Liu-Tang-Zhang method and
    Satterthwaite-Welch method. The technical details can be found in Hong Zhang, Judong Shen
    and Zheyang Wu (2022) "A fast and accurate approximation to the distributions of quadratic
    forms of Gaussian variables" <doi:10.1080/10618600.2021.2000423>.
License: GPL-2
URL: https://github.com/ZWuLab/Qapprox
BugReports: https://github.com/ZWuLab/Qapprox/issues
Imports: stats
Encoding: UTF-8
RoxygenNote: 6.1.0
NeedsCompilation: no
Packaged: 2026-08-09 18:01:42 UTC; zheyangwu
Author: Hong Zhang [aut],
  Judong Shen [aut],
  Zheyang Wu [aut, cre]
Maintainer: Zheyang Wu <zheyangwu@wpi.edu>
Repository: CRAN
Date/Publication: 2026-08-24 18:30:15 UTC
Built: R 4.6.1; ; 2026-08-24 22:53:47 UTC; unix
