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powerpkg  

Power Analyses for the Affected Sib Pair and the TDT Design
View on CRAN: Click here


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

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

Install by package version:
library("remotes")
install_version("powerpkg", "1.6")



Attach the package and use:
library("powerpkg")
Maintained by
Daniel E. Weeks
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2006-02-08
Latest Update: 2022-05-19
Description:
There are two main functions: (1) To estimate the power of testing for linkage using an affected sib pair design, as a function of the recurrence risk ratios. We will use analytical power formulae as implemented in R. These are based on a Mathematica notebook created by Martin Farrall. (2) To examine how the power of the transmission disequilibrium test (TDT) depends on the disease allele frequency, the marker allele frequency, the strength of the linkage disequilibrium, and the magnitude of the genetic effect. We will use an R program that implements the power formulae of Abel and Muller-Myhsok (1998). These formulae allow one to quickly compute power of the TDT approach under a variety of different conditions. This R program was modeled on Martin Farrall's Mathematica notebook.
How to cite:
Daniel E. Weeks (2006). powerpkg: Power Analyses for the Affected Sib Pair and the TDT Design. R package version 1.6, https://cran.r-project.org/web/packages/powerpkg. Accessed 18 Sep. 2026.
Previous versions and publish date:
(2026-07-09 06:43), 1.2 (2006-02-08 13:07), 1.3 (2010-09-11 11:27), 1.4 (2012-03-27 23:45), 1.5 (2012-10-11 20:57)
Other packages that cited powerpkg R package
View powerpkg citation profile
Other R packages that powerpkg depends, imports, suggests or enhances
Complete documentation for powerpkg
Functions, R codes and Examples using the powerpkg R package
Some associated functions: fnfam . fx . normplot . nsibs . ntdt . ntdt.q . plotDom . plotNsibs . plotNtdt . ptb . ptdt . 
Some associated R codes: fnfam.R . fx.R . normplot.R . nsibs.R . ntdt.R . ntdt.q.R . plotDom.R . plotNsibs.R . plotNtdt.R . ptb.R . ptdt.R .  Full powerpkg package functions and examples
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