| # File src/library/base/R/zapsmall.R |
| # Part of the R package, https://www.R-project.org |
| # |
| # Copyright (C) 1995-2018 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/ |
| |
| zapsmall <- function(x, digits = getOption("digits")) |
| { |
| if (length(digits) == 0L) |
| stop("invalid 'digits'") |
| if (all(ina <- is.na(x))) |
| return(x) |
| mx <- max(abs(x[!ina])) |
| round(x, digits = if(mx > 0) max(0L, digits - as.numeric(log10(mx))) else digits) |
| } |