pp: Extracting from an object of class powPar

In sse: Sample Size Estimation

Description

All information needed for the 'power-function' should be provided by an object of class powPar. To extract this information the function pp should be used.

Usage

pp(x, name)

Arguments

x	An object of class powPar.
name	A character indicating the name of the object to be extracted.

Value

Everything that can be stored within a list is possible.

Note

The name pp is an abbreviation for power parameter.

See Also

For extracting individual elements of n, theta and xi the functions n, theta, or xi should be used.

Examples

psi <- powPar(theta = seq(from = 0.5, to = 1.5, by = 0.5),
              n = seq(from = 10, to = 30, by = 10),
              muA = 0,
              muB = 1)
              

pp(psi, name = "muA")

## an example of usage
powFun <- function(psi){
  power.t.test(n = n(psi),
               delta = pp(psi, "muA") - pp(psi, "muB"),
               sd = theta(psi)
               )$power
}

## testing the power-function
powFun(psi)

sse documentation built on May 19, 2021, 3 p.m.