| # File src/library/base/R/is.R |
| # Part of the R package, https://www.R-project.org |
| # |
| # Copyright (C) 1995-2012 The R Core Team |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # A copy of the GNU General Public License is available at |
| # https://www.R-project.org/Licenses/ |
| |
| is.vector <- function(x, mode="any") .Internal(is.vector(x,mode)) |
| |
| `is.na<-` <- function(x, value) UseMethod("is.na<-") |
| |
| `is.na<-.default` <- function(x, value) |
| { |
| x[value] <- NA |
| x |
| } |
| |
| is.primitive <- function(x) |
| switch(typeof(x), "special" = , "builtin" = TRUE, FALSE) |