setAlphaspendfString: Function that Sets the expression of the base alpha spending...

In seqmon: Group Sequential Design Class for Clinical Trials

Description

Sets the expression of the base alpha spending function as a string. This function is only used if one needs to display the base alpha spending function as a string. This function DOES NOT update the base alpha spending function. One can use setBaseAlphaspendf() to change the base alpha spending function. The spending functions and their string expressions should be defined only once per object. They should not be updated during any interim update to the design.

Usage

setAlphaspendfString(theObject, string0)

Arguments

theObject	The sequential design object
string0	The string of the expression of the base alpha spending function. Its argument need to be 't'.

Value

an object of class "sequential.design"

Examples

design1<-sequential.design()
design1<-setAlphaspendfString(design1,'0.025*t^4')

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