knitr v0.7


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by Yihui Xie

A general-purpose package for dynamic report generation in R

This package provides a general-purpose tool for dynamic report generation in R, which can be used to deal with any type of (plain text) files, including Sweave, HTML, Markdown and reStructuredText. The patterns of code chunks and inline R expressions can be customized. R code is evaluated as if it were copied and pasted in an R terminal thanks to the evaluate package (e.g. we do not need to explicitly print() plots from ggplot2 or lattice). R code can be reformatted by the formatR package so that long lines are automatically wrapped, with indent and spaces being added, and comments being preserved. A simple caching mechanism is provided to cache results from computations for the first time and the computations will be skipped the next time. Almost all common graphics devices, including those in base R and add-on packages like Cairo, cairoDevice and tikzDevice, are built-in with this package and it is straightforward to switch between devices without writing any special functions. The width and height as well as alignment of plots in the output document can be specified in chunk options (the size of plots for graphics devices is still supported as usual). Multiple plots can be recorded in a single code chunk, and it is also allowed to rearrange plots to the end of a chunk or just keep the last plot. Warnings, messages and errors are written in the output document by default (can be turned off). Currently LaTeX, HTML, Markdown and reST are supported, and other output formats can be supported by hook functions. The large collection of hooks in this package makes it possible for the user to control almost everything in the R code input and output. Hooks can be used either to format the output or to run a specified R code fragment before or after a code chunk. The language in code chunks is not restricted to R only (there is simple support to Python and Awk, etc). Many features are borrowed or inspired by Sweave, cacheSweave, pgfSweave, brew and decumar.

Functions in knitr

Name Description
hook_rgl Built-in chunk hooks to extend knitr
knit Knit a document
knit_hooks Hooks for R code chunks, inline R code and output
knit_env The environment in which a code chunk is evaluated
knit_child Knit a child document
hook_plot_tex Default plot hooks for different output formats
opts_template Template for creating reusable chunk options
spin Spin goat's hair into wool
stitch Automatically create a report based on an R script and a template
image_uri Encode an image file to a data URI
all_patterns All built-in patterns
knitr-package A general-purpose tool for dynamic report generation in R
hook_ffmpeg_html Hooks to create animations in HTML output
knit2html Convert markdown to HTML using knit() and markdownToHTML()
fig_path Path for figure files
rand_seed An unevaluated expression to return .Random.seed if exists
read_chunk Read chunks from an external R script
rst2pdf A wrapper for rst2pdf
write_bib Generate BibTeX bibliography databases for R packages
set_header Set the header information
set_parent Specify the parent document of child documents
pat_rnw Set regular expressions to read input documents
eclipse_theme Download and convert a theme from to CSS
dep_prev Make later chunks depend on previous chunks
render_latex Set output hooks for different output formats
dep_auto Build automatic dependencies among chunks
knit2pdf Convert Rnw or Rrst files to PDF using knit() and texi2pdf() or rst2pdf()
knit_engines Engines of other languages
run_chunk Run the code in a specified chunk
knit_patterns Patterns to match and extract R code in a document
imgur_upload Upload a image to
opts_chunk Default and current chunk options
opts_knit Options for the knitr package
knit_theme Syntax highlighting themes
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Type Package
Date 2012-07-16
License GPL
Collate 'package.R' 'utils-upload.R' 'plot.R' 'defaults.R' 'parser.R' 'cache.R' 'pattern.R' 'output.R' 'block.R' 'hooks.R' 'utils.R' 'themes.R' 'highlight-css.R' 'highlight-renderer.R' 'header.R' 'themes-eclipse.R' 'concordance.R' 'engine.R' 'citation.R' 'hooks-chunk.R' 'hooks-extra.R' 'hooks-latex.R' 'hooks-html.R' 'hooks-md.R' 'hooks-rst.R' 'spin.R' 'highlight.R' 'utils-base64.R'
Packaged 2012-07-17 03:40:00 UTC; yihui
Repository CRAN
Date/Publication 2012-07-17 05:16:30

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