gMCP: sampSizeCore – R documentation

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sampSizeCore

Function for sample size calculation

Function for sample size calculation

sampSizeCore(upperN, lowerN = floor(upperN/2), targFunc, target,
  tol = 0.001, alRatio, Ntype = c("arm", "total"), verbose = FALSE, ...)

`upperN`	`targFunc(upperN)` should be bigger than target (otherwise `upperN` is doubled until this is the case).
`lowerN`	`targFunc(lowerN)` should be smaller than target (otherwise `lowerN` is halfed until this is the case).
`targFunc`	The target (power) function that should be monotonically increasing in `n`.
`target`	The target value. The function searches the `n` with `targFunc(n)-target<tol` and `targFunc(n)>target`.
`tol`	Tolerance: The function searches the `n` with `targFunc(n)-target<tol` and `targFunc(n)>target`.
`alRatio`	Allocation ratio.
`Ntype`	Either `"arm"` or `"total"`.
`verbose`	Logical, whether verbose output should be printed.
`...`	...

For details see the manual and examples.

Integer value n (of type numeric) with targFunc(n)-target<tol and targFunc(n)>target.

This function is taken from package DoseFinding under GPL from Bjoern Bornkamp, Jose Pinheiro and Frank Bretz

f <- function(x){1/100*log(x)}
gMCP:::sampSizeCore(upperN=1000, targFunc=f, target=0.008, verbose=TRUE, alRatio=1)

Graph Based Multiple Comparison Procedures

v0.8-15

GPL (>= 2)

Authors

Kornelius Rohmeyer [aut, cre], Florian Klinglmueller [aut]

Initial release