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#' Complete case indicator
#'
#'
#' The complete case indicator is useful for extracting the subset of complete cases. The function
#' \code{cci(x)} calls \code{complete.cases(x)}.
#' The companion function \code{ici()} selects the incomplete cases.
#'
#' @name cci
#' @param x An \code{R} object. Currently supported are methods for the
#' following classes: \code{mids}.
#' @return Logical vector indicating the complete cases.
#' @author Stef van Buuren, 2017.
#' @seealso \code{\link{complete.cases}}, \code{\link{ici}}, \code{\link{cc}}
#' @keywords univar
#' @examples
#' cci(nhanes) # indicator for 13 complete cases
#' cci(mice(nhanes, maxit = 0))
#' f <- cci(nhanes[, c("bmi", "hyp")]) # complete data for bmi and hyp
#' nhanes[f, ] # obtain all data from those with complete bmi and hyp
#' @export
cci <- function(x) UseMethod("cci", x)
#' @export
cci.mids <- function(x) {
complete.cases(x$data)
}
#' @export
cci.default <- function(x) {
complete.cases(x)
}
#' Incomplete case indicator
#'
#' This array is useful for extracting the subset of incomplete cases.
#' The companion function \code{cci()} selects the complete cases.
#'
#' @name ici
#' @aliases ici ici,data.frame-method ici,matrix-method ici,mids-method
#' @param x An \code{R} object. Currently supported are methods for the
#' following classes: \code{mids}.
#' @return Logical vector indicating the incomplete cases,
#' @author Stef van Buuren, 2017.
#' @seealso \code{\link{cci}}, \code{\link{ic}}
#' @keywords univar
#' @examples
#'
#' ici(nhanes) # indicator for 12 rows with incomplete cases
#' @export
ici <- function(x) UseMethod("ici", x)
#' @export
ici.mids <- function(x) {
!complete.cases(x$data)
}
#' @export
ici.default <- function(x) {
!complete.cases(x)
}
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