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#' Cochrane review: trim-and-fill method
#'
#' @description
#'
#' Conduct trim-and-fill analysis for all meta-analyses in a Cochrane
#' review.
#'
#' @param x An object of class \code{rm5} or \code{trimfill.rm5}.
#' @param comp.no Comparison number.
#' @param outcome.no Outcome number.
#' @param ... Additional arguments (passed on to \code{metacr}).
#'
#' @details
#' This function can be used to conduct a trim-and-fill analysis for
#' all or selected meta-analyses in a Cochrane review.
#'
#' Review Manager 5 (RevMan 5) was the software used for preparing and
#' maintaining Cochrane Reviews
#' (\url{https://training.cochrane.org/online-learning/core-software/revman}).
#' Data from a Cochrane review can be imported to R using the function
#' \code{read.rm5}.
#'
#' The R function \code{\link{metacr}} is called internally.
#'
#' @author Guido Schwarzer \email{guido.schwarzer@@uniklinik-freiburg.de}
#'
#' @seealso \code{\link{summary.meta}}, \code{\link{metacr}},
#' \code{\link{read.rm5}}, \code{\link{metabias.rm5}}
#'
#' @references
#' Higgins, J.P.T and S. Green (2011):
#' \emph{Cochrane Handbook for Systematic Reviews of Interventions
#' Version 5.1.0 [Updated March 2011]}.
#' The Cochrane Library: http://www.cochrane-handbook.org
#'
#' @examples
#' # Locate export data file "Fleiss1993_CR.csv"
#' # in sub-directory of package "meta"
#' #
#' filename <- system.file("extdata", "Fleiss1993_CR.csv", package = "meta")
#' Fleiss1993_CR <- read.rm5(filename)
#'
#' # Conduct trim-and-fill analysis
#' #
#' trimfill(Fleiss1993_CR)
#'
#' # Conduct trim-and-fill analysis only for second outcome of first
#' # comparison
#' #
#' trimfill(Fleiss1993_CR, comp.no = 1, outcome.no = 2)
#'
#' @method trimfill rm5
#' @export
trimfill.rm5 <- function(x, comp.no, outcome.no, ...) {
chkclass(x, "rm5")
##
if (missing(comp.no))
comp.no <- unique(x$comp.no)
##
res <- list()
##
n <- 1
##
for (i in comp.no) {
if (missing(outcome.no))
jj <- unique(x$outcome.no[x$comp.no == i])
else
jj <- outcome.no
for (j in jj) {
##
m1 <- metacr(x, i, j, ...)
##
if (!is.na(m1$TE.common) & is.null(m1$subgroup)) {
tf1 <- res[[n]] <- trimfill(m1)
##
n <- n + 1
}
}
}
##
class(res) <- "trimfill.rm5"
res
}
#' @rdname trimfill.rm5
#' @method print trimfill.rm5
#' @export
print.trimfill.rm5 <- function(x, ...) {
chkclass(x, "trimfill.rm5")
##
n <- 1
##
for (i in 1:length(x)) {
if (n > 1)
cat("\n*****\n\n")
##
print(x[[i]])
##
n <- n + 1
}
##
invisible(NULL)
}
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