exams: xweave – R documentation

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xweave

Wrapper Function for Weaving Either Rnw or Rmd Exercises

Description

Simple wrapper function that either calls Sweave for Rnw exercises or knit for Rmd exercises.

Usage

xweave(file, quiet = TRUE, encoding = NULL, engine = NULL, envir = new.env(),
    pdf = TRUE, png = FALSE, svg = FALSE, height = 6, width = 6, resolution = 100,
    highlight = FALSE, ...)

Arguments

`file, quiet, encoding`	arguments passed to `Sweave` or `knit`, respectively.
`engine`	character indicating whether `"Sweave"` (default) or `"knitr"` should be used for rendering Rnw exercises.
`envir`	argument passed to `knit`. By default, or if `envir = NULL` a `new.env()` is created for each `xweave()` call.
`pdf, png, svg, height, width, resolution, highlight, ...`	arguments passed to `Sweave` or `opts_chunk`, respectively. In the latter case: `pdf`/`png`/`svg` are mapped to `dev`; `height`/`width` are mapped to `fig.height`/`fig.width`; and `resolution` is mapped to `dpi`. `highlight` is ignored for `Sweave`.

Details

Depending on whether file has an .Rnw or .Rmd suffix, either Sweave or knit is called for weaving the file by default. Rnw exercises can optionally also be weaved by knit by setting engine = "knitr".

If png = TRUE or svg = TRUE when calling Sweave, then the resulting includegraphics statements are supplemented with the .png or .svg suffix of the corresponding graphics. For svg a simple graphics device hook .xweave_svg_grdevice is provided on-the-fly for plug-in into Sweave.