# RweaveLatex

0th

Percentile

##### R/LaTeX Driver for Sweave

A driver for Sweave that translates R code chunks in LaTeX files.

Keywords
utilities
##### Usage
RweaveLatex()RweaveLatexSetup(file, syntax, output = NULL, quiet = FALSE,
debug = FALSE, stylepath, ...)
##### Arguments
file
Name of Sweave source file. See the description of the corresponding argument of Sweave.
syntax
An object of class SweaveSyntax.
output
Name of output file. The default is to remove extension .nw, .Rnw or .Snw and to add extension .tex. Any directory paths in file are also removed such that the output is created in the current working directory.
quiet
If TRUE all progress messages are suppressed.
debug
If TRUE, input and output of all code chunks is copied to the console.
stylepath
See Details.
...
named values for the options listed in Supported Options.
##### Details

The LaTeX file generated needs to contain the line \usepackage{Sweave}, and if this is not present in the Sweave source file (possibly in a comment), it is inserted by the RweaveLatex driver. If stylepath = TRUE, a hard-coded path to the file Sweave.sty in the Rinstallation is set in place of Sweave. The hard-coded path makes the LaTeX file less portable, but avoids the problem of installing the current version of Sweave.sty to some place in your TeX input path. However, TeX may not be able to process the hard-coded path if it contains spaces (as it often will under Windows) or TeX special characters.

The default for stylepath is now taken from the environment variable SWEAVE_STYLEPATH_DEFAULT, or is FALSE it that is unset or empty. If set, it should be exactly TRUE or FALSE: any other values are taken as FALSE.

The simplest way for frequent Sweave users to ensure that Sweave.sty is in the TeX input path is to add R_HOME/share/texmf as a texmf tree (root directory in the parlance of the MiKTeX settings utility).

By default, Sweave.sty sets the width of all included graphics to: \setkeys{Gin}{width=0.8\textwidth}.

This setting affects the width size option passed to the \includegraphics{} directive for each plot file and in turn impacts the scaling of your plot files as they will appear in your final document.

Thus, for example, you may set width=3 in your figure chunk and the generated graphics files will be set to 3 inches in width. However, the width of your graphic in your final document will be set to 0.8\textwidth and the height dimension will be scaled accordingly. Fonts and symbols will be similarly scaled in the final document.

You can adjust the default value by including the \setkeys{Gin}{width=...} directive in your .Rnw file after the \begin{document} directive and changing the width option value as you prefer, using standard LaTeX measurement values.

If you wish to override this default behavior entirely, you can add a \usepackage[nogin]{Sweave} directive in your preamble. In this case, no size/scaling options will be passed to the \includegraphics{} directive and the height and width options will determine both the runtime generated graphic file sizes and the size of the graphics in your final document.

Sweave.sty also supports the [noae] option, which suppresses the use of the ae package, the use of which may interfere with certain encoding and typeface selections. If you have problems in the rendering of certain character sets, try this option.

As from R3.1.0 it also supports the [inconsolata] option, to render monospaced text in inconsolata, the font used by default for Rhelp pages.

The use of fancy quotes (see sQuote) can cause problems when setting Routput. Either set options(useFancyQuotes = FALSE) or arrange that LaTeX is aware of the encoding used (by a \usepackage[utf8]{inputenc} declaration: Windows users of Sweave from Rgui.exe will need to replace utf8 by cp1252 or similar) and ensure that typewriter fonts containing directional quotes are used.

Some LaTeX graphics drivers do not include .png or .jpg in the list of known extensions. To enable them, add something like \DeclareGraphicsExtensions{.png,.pdf,.jpg} to the preamble of your document or check the behavior of your graphics driver. When both pdf and png are TRUE both files will be produced by Sweave, and their order in the DeclareGraphicsExtensions list determines which will be used by pdflatex.

##### Custom Graphics Devices

If option grdevice is supplied for a code chunk with both fig and eval true, the following call is made get(options\$grdevice, envir = .GlobalEnv)(name=, width=, height=, options) which should open a graphics device. The chunk's code is then evaluated and dev.off is called. Normally a function of the name given will have been defined earlier in the Sweave document, e.g. <>= my.Swd <- function(name, width, height, ...) grDevices::png(filename = paste(name, "png", sep = "."), width = width, height = height, res = 100, units = "in", type = "quartz", bg = "transparent") @ Currently only one custom device can be used for each chunk, but different devices can be used for different chunks.

A replacement for dev.off can be provided as a function with suffix .off, e.g.my.Swd.off().

##### Hook Functions

Before each code chunk is evaluated, zero or more hook functions can be executed. If getOption("SweaveHooks") is set, it is taken to be a named list of hook functions. For each logical option of a code chunk (echo, print, ...) a hook can be specified, which is executed if and only if the respective option is TRUE. Hooks must be named elements of the list returned by getOption("SweaveHooks") and be functions taking no arguments. E.g., if option "SweaveHooks" is defined as list(fig = foo), and foo is a function, then it would be executed before the code in each figure chunk. This is especially useful to set defaults for the graphical parameters in a series of figure chunks.

Note that the user is free to define new Sweave logical options and associate arbitrary hooks with them. E.g., one could define a hook function for a new option called clean that removes all objects in the workspace. Then all code chunks specified with clean = TRUE would start operating on an empty workspace.

Sweave, Rtangle