| # File src/library/base/R/gl.R |
| # Part of the R package, https://www.R-project.org |
| # |
| # Copyright (C) 1995-2013 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/ |
| |
| ## gl function of GLIM |
| |
| gl <- function (n, k, length = n*k, labels=seq_len(n), ordered=FALSE) |
| { |
| ## We avoid calling factor(), for efficiency. |
| |
| ## Must set levels before class. |
| ## That way, `levels<-` will pick up an invalid |
| ## labels specification. |
| |
| f <- rep_len(rep.int(seq_len(n), rep.int(k,n)), length) |
| levels(f) <- as.character(labels) |
| class(f) <- c(if (ordered) "ordered", "factor") |
| f |
| } |