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### transformSummaryTable.R ---
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## Author: Brice Ozenne
## Created: feb 3 2020 (18:29)
## Version:
## Last-Updated: jan 24 2022 (10:47)
## By: Brice Ozenne
## Update #: 29
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### Commentary:
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### Change Log:
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### Code:
#' @title Apply Transformation to Summary Table
#' @description Update summary table according to a transformation, e.g. log-transformtion.
#' P-values are left unchanged but estimates, standard errors, and confidence intervals are updated.
#'
#' @param object A data.frame with columns estimate, se, lower, upper.
#' @param transform the name of a transformation or a function.
#'
#' @return a data.frame
#' @export
transformSummaryTable <- function(object, transform = NULL){
if(is.null(transform)){
return(object)
}else if(identical(transform,"atanh")){
transform <- atanh
dtransform <- function(x){1/(1-x^2)}
}else if(identical(transform,"exp")){
transform <- exp
dtransform <- function(x){exp(x)}
}else if(identical(transform,"log")){
transform <- log
dtransform <- function(x){1/x}
}else if(identical(transform,"loglog")){
transform <- function(x){log(log(x))}
dtransform <- function(x){1/(-x*log(x))}
}else if(identical(transform,"cloglog")){
transform <- function(x){log(log(1-x))}
dtransform <- function(x){1/(-(1-x)*log(1-x))}
}else if(!is.null(attr(transform,"derivative"))){
dtransform <- attr(transform,"derivative")
}else{
dtransform <- function(x){diag(numDeriv::jacobian(transform, x))}
}
object[,"se"] <- object[,"se"]*dtransform(object[,"estimate"])
object[,"estimate"] <- transform(object[,"estimate"])
if("lower" %in% names(object)){
object[,"lower"] <- transform(object[,"lower"])
}
if("upper" %in% names(object)){
object[,"upper"] <- transform(object[,"upper"])
}
if("null" %in% names(object)){
object[,"null"] <- transform(object[,"null"])
}
if("null" %in% names(object)){
object[,"null"] <- transform(object[,"null"])
}
return(object)
}
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### transformSummaryTable.R ends here
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