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% File src/library/tools/man/Rdiff.Rd
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% File src/library/tools/man/Rdiff.Rd
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% Part of the R package, http://www.R-project.org
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% Part of the R package, http://www.R-project.org
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% Copyright 2010-11 R Core Team
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% Copyright 2010-13 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{Rdiff}
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\name{Rdiff}
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\alias{Rdiff}
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\alias{Rdiff}
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\title{Difference R Output Files}
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\title{Difference R Output Files}
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\item{Log}{logical: should the returned value include a log of
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\item{Log}{logical: should the returned value include a log of
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differences found?}
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differences found?}
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}
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}
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\details{
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\details{
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The \R startup banner and any timing information from \command{R CMD
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The \R startup banner and any timing information from \command{R CMD
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BATCH} are removed from both files, together with lines about loading
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BATCH} are removed from both files, together with lines about
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packages. UTF-8 fancy quotes (see \code{\link{sQuote}}) and on
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loading packages. UTF-8 fancy quotes (see \code{\link{sQuote}}) and
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Windows, Windows' so-called \sQuote{smart quotes} are mapped to a
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on Windows, Windows' so-called \sQuote{smart quotes}, are mapped to
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simple quote. Addresses of environments, compiled bytecode and other
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a simple quote. Addresses of environments, compiled bytecode and
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exotic types expressed as hex addresses (e.g. \code{<environment:
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other exotic types expressed as hex addresses
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0x12345678>}) are mapped to \code{0x00000000}. The files are then
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(e.g. \code{<environment: 0x12345678>}) are mapped to
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compared line-by-line. If there are the same number of lines and
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\code{0x00000000}. The files are then compared line-by-line. If
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\code{useDiff} is false, a simple \command{diff}-like display of
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there are the same number of lines and \code{useDiff} is false, a
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simple \command{diff}-like display of differences is printed (which
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ignores differences in consecutive spaces), otherwise \command{diff
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-bw} is called on the edited files. (This tries to ignore all
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differences is printed, otherwise \command{diff -bw} is called on the
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differences in whitespace: note that flag \option{-w} is not
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required by POSIX but is supported by GNU, Solaris and FreeBSD
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edited files.
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versions.)
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As from \R 2.14.0 this can compare uncompressed PDF files, ignoring
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This can compare uncompressed PDF files, ignoring differences in
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differences in creation and modification dates.
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creation and modification dates.
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}
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}
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\value{
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\value{
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If \code{Log} is true, a list with components \code{status} (see
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If \code{Log} is true, a list with components \code{status} (see
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below) and \code{out}, a character vector of descriptions of
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below) and \code{out}, a character vector of descriptions of
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differences, possibly of zero length.
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differences, possibly of zero length.
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