knitr v0.1


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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 and HTML. 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 and Markdown 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. Most 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
opts_chunk Default and current chunk options
set_header Set the header information
knit_theme Syntax highlighting themes
knit_patterns Patterns to match and extract R code in a document
knit_hooks Hooks for R code chunks, inline R code and output
render_latex Set output hooks for different output formats
knit2pdf Convert Rnw to PDF using knit and texi2pdf
opts_knit Options for the knitr package
fig_path Path for figure files
all_patterns All built-in patterns
eclipse_theme Download and convert a theme from to CSS
read_chunk Read chunks from an external R script
hook_plot_tex Default plot hooks for different output formats
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Last month downloads


Type Package
Date 2012-01-18
License GPL
Collate 'package.R' 'defaults.R' 'parser.R' 'cache.R' 'pattern.R' 'output.R' 'block.R' 'hooks.R' 'utils.R' 'plot.R' 'zzz.R' 'header.R' 'themes.R' 'eclipse.R'
Packaged 2012-01-17 06:52:19 UTC; yihui
Repository CRAN
Date/Publication 2012-01-17 07:59:42

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