| # File src/library/graphics/R/units.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/ |
| |
| xinch <- function(x=1, warn.log=TRUE) { |
| if(warn.log && par("xlog")) warning("x log scale: xinch() is nonsense") |
| x * diff(par("usr")[1L:2])/par("pin")[1L] |
| } |
| yinch <- function(y=1, warn.log=TRUE) { |
| if(warn.log && par("ylog")) warning("y log scale: yinch() is nonsense") |
| y * diff(par("usr")[3:4])/par("pin")[2L] |
| } |
| |
| xyinch <- function(xy=1, warn.log=TRUE) { |
| if(warn.log && (par("xlog") || par("ylog"))) |
| warning("log scale: xyinch() is nonsense") |
| u <- par("usr"); xy * c(u[2L]-u[1L], u[4L]-u[3L]) / par("pin") |
| } |