

   AArree AAllll // AAnnyy VVaalluueess TTrruuee??

        all(..., na.rm=FALSE)
        any(..., na.rm=FALSE)

   VVaalluuee::

        Given a sequence of logical arguments, `all' returns a
        logical value indicating whether or not all of the ele-
        ments of `x' are `TRUE'.  The value returned is `TRUE'
        if all the values in `x' are `TRUE', and `FALSE' if any
        the values in `x' are `FALSE'.  If `x' consists of a
        mix of `TRUE' and `NA' values, then `all' returns `NA'.

        Given a sequence of logical arguments, `any' returns a
        logical value indicating whether or not any of the ele-
        ments of `x' are `TRUE'.  The value returned is `TRUE'
        if any the values in `x' are `TRUE', and `FALSE' if all
        the values in `x' are `FALSE'.  If `x' consists of a
        mix of `FALSE' and `NA' values, then `any' returns
        `NA'.

        For both functions the argument `na.rm' indicates
        whether `NA' values should be removed before the result
        is computed.

   EExxaammpplleess::

        range(x <- sort(round(rnorm(10) - 1.2,1)))
        if(any(x < 0)) cat("x contains negative values\n")
        if(all(x < 0)) cat("all x values are negative\n")

