[R] Sample Size Calculation using a Drop the Loser/Keep the Winner Design

Paul Miller pjmiller_57 at yahoo.com
Mon Sep 26 23:09:41 CEST 2011

Hello Everyone,
I need to perform a sample size calculation using a drop the loser/keep the winner design. I've been searching for examples of how to do this using R but haven't found much. 
The most promising possibility thus far is an R function called DrpLsrNRst. This appears in the book "Adaptive Design Theory and Implementation Using SAS and R". I found the function online but there's a copyright statement saying it can only be used by those who have purchased the book.
I thought about purchasing the book, but a reviewer on Amazon indicated it's mostly a SAS book with a little R code thrown in and an examination of the TOC suggests this is the case. I'm still primarily a SAS user, but am in the process of changing that. So I'm shying away from purchasing what I perceive to be a SAS book unless it's really necessary.
Does anyone know of any other resources? 

More information about the R-help mailing list