setNoncentrality: Function that sets the noncentrality parameter

In seqmon: Group Sequential Design Class for Clinical Trials

Description

Sets the noncentrality parameter.

Usage

setNoncentrality(theObject, noncent)

Arguments

theObject	The sequential design object
noncent	The noncentrality parameter

Details

The noncentrality paraeter is the expected drift at the end of the study. For example, if the study has a power of 80% using a one sided Z-test with 2.5% type 1 error, the noncentrality parameter is q(0.975)+q(0.8), where q() is the percentile function of the standard normal distribution.

Value

an object of class "sequential.design"

Examples

design1<-sequential.design()
noncent<-qnorm(0.975,0,1)+qnorm(0.8,0,1)
design1<-setNoncentrality(design1,noncent)

seqmon documentation built on Sept. 5, 2020, 1:06 a.m.