Bioequivalence and Bioavailability Forum • Symmetrical in log-scale

Symmetrical in log-scale [Power / Sample Size]

posted by BE-proff – 2017-07-24 13:42 (2900 d 19:18 ago) – Posting: # 17599
Views: 8,882

Hi Helmut,

Many thanks for clarification! :clap:

Could you please tell how to add study design to :confused:

library(PowerTOST)

CV     <- 0.26

theta0 <- seq(0.85, 1.20, 0.05)

thetas <- length(theta0)

target <- c(0.8, 0.9)

result <- data.frame(CV=rep(CV, thetas), GMR=sprintf("%.4f", theta0),

                     n1=rep(NA, thetas), pwr1=rep(NA, thetas),

                     n2=rep(NA, thetas), pwr2=rep(NA, thetas))

names(result)[3:6] <- rep(c("n", "power"), 2)

for (j in seq_along(theta0)) {

  x1 <- sampleN.TOST(CV=CV, theta0=theta0[j],

                     targetpower=target[1], print=F)

  x2 <- sampleN.TOST(CV=CV, theta0=theta0[j],

                     targetpower=target[2], print=F)

  result[j, 3] <- x1[["Sample size"]]

  result[j, 4] <- sprintf("%.2f%%", 100*x1[["Achieved power"]])

  result[j, 5] <- x2[["Sample size"]]

  result[j, 6] <- sprintf("%.2f%%", 100*x2[["Achieved power"]])

}

print(result, row.names=FALSE)

Complete thread:

How to create table of results BE-proff 2017-07-20 14:09 [Power / Sample Size]
- How to create table of results ElMaestro 2017-07-20 14:32
  - How to create table of results BE-proff 2017-07-20 15:02
- How to create table of sample sizes / powers Helmut 2017-07-20 15:18
  - How to create table of sample sizes / powers BE-proff 2017-07-20 16:00
    - Symmetrical in log-scale Helmut 2017-07-20 17:12
      - Symmetrical in log-scaleBE-proff 2017-07-24 11:42
        
        RTFM Helmut 2017-07-24 18:18