MSU

QpowR


Juan P. Steibel

Home

Software

Data
SNP chip
PRRSV
Power Calculator for Genetic Association Studies of Quantitative Traits.
Screen shot
Summary
Interactive power calculator for two-stage design of GWA studies with unrelated individuals.

QpowR computes power and critical values for replication based and joint tests of association between a marker and a quantitative trait.

Platforms: Linux, Mac, Windows.

Requirements: R system.
Download and Run
QpowR is implemented in the R language.
1) Install R
2) Download this script file to a working directory (/PATH/): QpowR.r
3) Start the R console and type: >source(“/PATH/QpowR.r”)
4) Use the graphical interface to input design parameters (see user guide).
Documentation
User guide in pdf format. It includes an appendix with technical details on two-stage power calculations.
Citation
Steibel JP and Abecasis GR. 2008. QpowR: Interactive power calculator for two-stage genetic association studies of quantitative traits.  In preparation.
Registration
Fill the registration form to get updates on new versions of QpowR.
Visitors:

free web
                        counter