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Qapprox  

Approximation to the Survival Functions of Quadratic Forms of Gaussian Variables
View on CRAN: Click here


Download and install Qapprox package within the R console
Install from CRAN:
install.packages("Qapprox")

Install from Github:
library("remotes")
install_github("cran/Qapprox")

Install by package version:
library("remotes")
install_version("Qapprox", "0.2.1")



Attach the package and use:
library("Qapprox")
Maintained by
Hong Zhang
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2020-09-29
Latest Update: 2021-07-07
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 (2020) .
How to cite:
Hong Zhang (2020). Qapprox: Approximation to the Survival Functions of Quadratic Forms of Gaussian Variables. R package version 0.2.1, https://cran.r-project.org/web/packages/Qapprox. Accessed 28 Oct. 2026.
Previous versions and publish date:
(2026-08-24 20:30), 0.1.0 (2020-09-29 10:10), 0.2.0 (2021-07-07 06:30)
Other packages that cited Qapprox R package
View Qapprox citation profile
Other R packages that Qapprox depends, imports, suggests or enhances
Complete documentation for Qapprox
Functions, R codes and Examples using the Qapprox R package
Some associated functions: Qapprox . Qapprox_nc . 
Some associated R codes: Qapprox.R . Qapprox_nc.R .  Full Qapprox package functions and examples
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