R/missingCh.R

In mmaechler/sfsmisc: Utilities from 'Seminar fuer Statistik' ETH Zurich

Defines functions missingCh

Documented in missingCh

missingCh <- function(x, envir = parent.frame()) {
    stopifnot(is.character(x))
    eval(substitute(missing(VAR), list(VAR=as.name(x))),
         envir = envir)
}