Nothing
Functions to calculate power and sample size for testing (1) mediation effects; (2) the slope in a simple linear regression; (3) odds ratio in a simple logistic regression; (4) mean change for longitudinal study with 2 time points; (5) interaction effect in 2way ANOVA; and (6) the slope in a simple Poisson regression.
Package details 


Author  Weiliang Qiu <weiliang.qiu@gmail.com> 
Maintainer  Weiliang Qiu <weiliang.qiu@gmail.com> 
License  GPL (>= 2) 
Version  0.3.4 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.