Sample sizes (ignoring the inflated TIE) [RSABE / ABEL]

posted by Helmut Homepage – Vienna, Austria, 2020-11-29 11:21 (321 d 23:23 ago) – Posting: # 22092
Views: 3,017

Dear Detlew,

» there is no need to define and program a new function :cool:!

Great!

library(PowerTOST)
design <- "2x2x4"
regGCC <- reg_const("user", r_const = log(1/0.75)/CV2se(0.3),
                    CVswitch = 0.3, CVcap = 0.3, pe_const = TRUE)
CV     <- sort(c(seq(0.2, 0.6, 0.1), 0.301))
res    <- data.frame(CV = CV, L.EMA = scABEL(CV, regulator = "EMA")[, 1],
                     U.EMA = scABEL(CV, regulator = "EMA")[, 2], n.EMA = NA,
                     L.GCC = scABEL(CV, regulator = regGCC)[, 1],
                     U.GCC = scABEL(CV, regulator = regGCC)[, 2], n.GCC = NA)
for (j in 1:nrow(res)) {
  res$n.EMA[j] <- sampleN.scABEL(CV = CV[j], design = design, regulator = "EMA",
                                 details = FALSE, print = FALSE)[["Sample size"]]
  res$n.GCC[j] <- sampleN.scABEL(CV = CV[j], design = design, regulator = regGCC,
                                 details = FALSE, print = FALSE)[["Sample size"]]
}
print(res, row.names = FALSE)

    CV     L.EMA    U.EMA n.EMA L.GCC    U.GCC n.GCC
 0.200 0.8000000 1.250000    18  0.80 1.250000    18
 0.300 0.8000000 1.250000    34  0.75 1.333333    28
 0.301 0.7994604 1.250844    34  0.75 1.333333    28
 0.400 0.7461770 1.340165    30  0.75 1.333333    30
 0.500 0.6983678 1.431910    28  0.75 1.333333    42
 0.600 0.6983678 1.431910    32  0.75 1.333333    58


PS: Do we have a bug in scABEL()?

CV  <- c(0.3, 0.3+10^(-6:-2))
lim <- scABEL(CV)
res <- data.frame(CV = CV, L = lim[, 1], U = lim[, 2])
print(res, row.names = FALSE)

       CV         L        U
 0.300000 0.8000000 1.250000
 0.300001 0.8000296 1.249954
 0.300010 0.8000244 1.249962
 0.300100 0.7999731 1.250042
 0.301000 0.7994604 1.250844
 0.310000 0.7943616 1.258873


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Helmut Schütz
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