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CHANGES IN knitr VERSION 1.3
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@yihui yihui released this 25 May 21:27
· 3626 commits to master since this release
v1.3
3a67643

NEW FEATURES

  • added support for AsciiDoc; see example 089 at https://github.com/yihui/knitr-examples/blob/master/089-minimal.Rasciidoc (thanks, Richard Cotton)
  • added support for reStructuredText vignettes in packages; now *.Rrst documents are recognized as vignettes as well, and they will be compiled to PDF via rst2pdf (#533) (thanks, Trevor L Davis)
  • a new function kable() to produce simple tables; see the vignette datatables in browseVignettes(package = 'knitr') for an application; also see a LaTeX example at https://github.com/yihui/knitr-examples/blob/master/091-knitr-table.Rnw
  • the chunk options fig.width and fig.height are vectorized according to the dev option, e.g. fig.wdith = c(7, 10) and dev = c('pdf', 'png') (#538) (thanks, @baptiste)
  • for purl(), code chunks with the option purl=FALSE will not be included in the R script (#519, thanks, Sebastian)
  • new 'hide' value to the fig.show option; the figures are created but not included in the output document (#532) (thanks, Simon)
  • the sas engine uses the listings output now (#541) and was tweaked for better LaTeX display (#562) (thanks, Nick Salkowski)
  • added a quick and dirty c engine (via R CMD SHLIB); see https://github.com/yihui/knitr-examples/blob/master/090-engine-c.Rmd for an example
  • added a new engine asy for Asymptote, a vector graphics language (http://asymptote.sourceforge.net); see examples 093 at https://github.com/yihui/knitr-examples (thanks, Thibaut Lamadon, #559)
  • added a new engine cat to write the content of a code chunk to a file; see the example 095 at https://github.com/yihui/knitr-examples (thanks, Stephen Eglen)
  • added a new function knit_exit() to allow knit() to exit early as if it had reached the end of the document (#524, thanks, Renaud)
  • the chunk option fig.align also works for Markdown output now, e.g., fig.align = 'center' will center images in HTML via the style attribute of the <img> tag (#387)
  • the argument format in the pandoc() function was vectorized, e.g. we can call pandoc(input, format = c('html', 'latex')) and the input file will be converted to HTML and LaTeX, respectively (#547, thanks, Jeroen Ooms)
  • added an argument options to knit_child() to set global chunk options for child documents; if a parent chunk calls a child document (via the child option), the chunk options of the parent chunk will be used as global options for the child document, e.g. for <<foo, child='bar.Rnw', fig.path='figure/foo-'>>=, the figure path prefix will be figure/foo- in bar.Rnw; see http://stackoverflow.com/q/17514055/559676 for an application
  • eclipse_theme() works with font weight (bold) and font style (italic) now when parsing themes from http://eclipsecolorthemes.org
  • added two package options latex.options.graphicx and latex.options.color to allow customization of LaTeX package options, e.g. opts_knit$set(latex.options.color = 'monochrome') generates \usepackage[monochrome]{color} in the LaTeX output (#546)
  • added a new package option unnamed.chunk.label to set the chunk labels for unnamed chunks, e.g. opts_knit$set(unnamed.chunk.label = 'fig') will generate chunk labels fig-1, fig-2, ... (#555) (thanks, Noam Ross)
  • when knit() is running, a global option knitr.in.progress will be set to TRUE; this allows other package authors (e.g. rCharts and googleVis) to adjust certain package options according to getOption('knitr.in.progress') (thanks, Ramnath V, #564)

BUG FIXES

  • fixed #502: using layout() and par() at the same time under R 3.0.0 may lead to a corrupt plot (thanks, Hong Xu http://tex.stackexchange.com/q/108335/9128)
  • fixed a bug in pandoc(): for single-lettered Pandoc arguments, the values are passed to them after spaces instead of equal signs (reported at http://stackoverflow.com/q/16569010/559676)
  • fixed #542: when a child document has a sub-child document and also uses set_parent(), the LaTeX header will be added to the wrong file (thanks, Johan Toloe)
  • stitch_rmd() was using a wrong R Markdown template
  • fixed #537: misleading error message when the graphical device does not exist (thanks, Scott Kostyshak)
  • fixed a bug in hook_rgl() reported at http://cos.name/cn/topic/110742 (incorrect LaTeX code when fig.align='center' and fig.show='hold')
  • fixed #565: added the envir argument to spin() so that the code is evaluated in the correct environment by default (thanks, @GillesSanMartin)

MAJOR CHANGES

  • purl() will write the chunk headers in # ---- label, opts ---- instead of # @knitr label, opts, i.e. @knitr was changed to four dashes ----; similarly, read_chunk() will use the pattern # ---- label ---- to read external code (the old syntax # @knitr is still preserved for compatibility); the main reason for this change is that RStudio uses four dashes in R comments as section headings, so that it is possible to fold sections of R
  • syntax highlighting is done by the highr package if it has been installed, otherwise the old regular-expression-based syntax highlighting will still be used; the highr package does much better syntax highlighting than the regexp-based approach (#327)
  • the commands for syntax highlighting were changed for compatibility with Andre Simon's Highlight package; this will affect LaTeX and HTML users, e.g. \hlnumber was renamed to \hlnum; cached LaTeX and HTML will have to be rebuilt for the new syntax highlighting commands to work (#470)
  • the argument eval was removed in knit_child(); if we do not want to evaluate a child document, we can set eval=FALSE in its parent chunk
  • the script inst/bin/knit gains an option -o to specify the output filenames for knit() (#525, thanks, Aaron Wolen)
  • the default video format for animations is OGG (it is open and free) instead of MP4 (non-free) now; this means Internet Explorer under Windows may not work with the animations (consider Firefox, Chrome and other modern web browsers)
  • warnings and messages in adjacent output chunks are merged, respectively (#534)
  • when the package option verbose = TRUE, the time stamp will be printed after each chunk using timestamp(), but this will mess up with the R command history, so now knitr uses cat() to write the time stamp (#545) (thanks, @knokknok)
  • the argument base in read_rforge() was removed and hard-coded inside the function instead
  • for Markdown output, the figure filenames no longer allow special characters like spaces, and special characters will be automatically replaced by _; this change will avoid problems when publishing to RPubs from RStudio: if figure paths contain special characters, the figures will not be uploaded (thanks, Sangsoon Woo)

MINOR CHANGES

  • the package vignettes uses \VignetteEngine{knitr::knitr} instead of \VignetteEngine{knitr} so that the next version of R can compile the vignettes out of the box (via R CMD Sweave) and no longer need to build the whole package in order to build the vignettes

MAINTAINENCE

  • the package vignettes were moved to the vignettes directory from inst/doc since the former will be preferred by the future versions of R
  • the testing is done via the testit package now (http://cran.r-project.org/package=testit)

MISC

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