Add caption and label for htmlwidgets #118
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I guess you mean "caption" instead of legend. If that is the case, yes, figure captions and labels are supported, but only when the widgets are rendered as screenshots. You can see Section 2.8 of the PDF version of the bookdown book https://bookdown.org/yihui/bookdown/ |
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is it possible to support html output? |
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Currently it is not supported, but I can consider it in the near future. |
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Thanks for your consideration. |
yihui
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Done. You can install the development versions of bookdown and knitr via devtools::install_github('rstudio/bookdown')cc @cpsievert |
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Upstream changes: CHANGES IN knitr VERSION 1.15.1 @yihui yihui released this on 23 Nov 2016 · 49 commits to master since this release NEW FEATURES added a new hook function hook_pngquant() that can call pngquant to optimize PNG images (thanks, @slowkow, #1320) BUG FIXES not really a knitr bug, but knit_params() should be better at dealing with multibyte characters now due to the bug fix in the yaml package vubiostat/r-yaml#6 Downloads Source code (zip) Source code (tar.gz) v1.15 b08a7bc CHANGES IN knitr VERSION 1.15 @yihui yihui released this on 10 Nov 2016 · 63 commits to master since this release NEW FEATURES NA values can be displayed using different characters (including empty strings) in kable(); you can set the option knitr.kable.NA, e.g. options(knitr.kable.NA = '') to hide NA values (#1283) added a fortran95 engine (thanks, @stefanedwards, #1282) added a block2 engine for R Markdown documents as an alternative to the block engine; it should be faster and supports arbitrary Pandoc's Markdown syntax, but it is essentially a hack; note when the output format is LaTeX/PDF, you have to define \let\BeginKnitrBlock\begin \let\EndKnitrBlock\end in the LaTeX preamble figure captions specified in the chunk option fig.cap are also applied to HTML widgets (thanks, @byzheng, rstudio/bookdown#118) when the chunk option fig.show = 'animate' and ffmpeg.format = 'gif', a GIF animation of the plots in the chunk will be generated for HTML output (https://twitter.com/thomasp85/status/785800003436421120) added a width argument to write_bib() so long lines in bib entries can be wrapped the inline syntax r#code is also supported besides r code; this can make sure the inline expression is not split when the line is wrapped (thanks, Dave Jarvis) provided a global R option knitr.use.cwd so users can choose to evaluate the R code chunks in the current working directory after setting options(knitr.use.cwd = TRUE); the default is to evaluate code in the directory of the input document, unless the knitr option opts_knit$set(root.dir = ...) has been set if options(knitr.digits.signif = TRUE), numbers from inline expressions will be formatted using getOption('digits') as the number of significant digits, otherwise (the default behavior) getOption('digits') is treated as the number of decimal places (thanks, @numatt, #1053) the chunk option engine.path can also be a list of paths to the engine executables now, e.g., you can set knitr::opts_chunk$set(engine.path = list(python = '/anaconda/bin/python', perl = '/usr/local/bin/perl')), then when a python code chunk is executed, /anaconda/bin/python will be called instead of the system default (rstudio/rmarkdown#812) introduced a mechanism to protect text output in the sense that it will not be touched by Pandoc during the conversion from R Markdown to another format; this is primarily for package developers to extend R Markdown; see ?raw_output for details (which also shows new functions extract_raw_output() and restore_raw_output()) MAJOR CHANGES the minimal version of R required for knitr is 3.1.0 now (#1269) the formatR package is an optional package since the default chunk option tidy = FALSE has been there for a long time; if you use tidy = TRUE, you need to install formatR separately if it is not installed :set +m is no longer automatically added to haskell code chunks (#1274) MINOR CHANGES the package option opts_knit$get('stop_on_error') has been removed the confusing warning message about knitr::knit2html() when buiding package vignettes using the knitr::rmarkdown engine without pandoc/pandoc-citeproc has been removed (#1286) the default value of the quiet argument of plot_crop() was changed from !opts_knit$get('progress') to TRUE, i.e., by default the messages from cropping images are suppressed BUG FIXES the chunk option cache.vars did not really behave like what was documented (thanks, @simonkth, #1280) asis_output() should not be merged with normal character output when results='hold' (thanks, @kevinushey, #1310) Downloads Source code (zip) Source code (tar.gz) v1.14 b34be0d CHANGES IN knitr VERSION 1.14 @yihui yihui released this on 12 Aug 2016 · 845 commits to master since this release NEW FEATURES improved caching for Rcpp code chunks: the shared library built from the C++ code will be preserved on disk and reloaded the next time if caching is enabled (chunk option cache = TRUE), so that the exported R functions are still usable in later R code chunks; note this feature requires Rcpp >= 0.12.5.6 (thanks, @jjallaire, #1239) added a helper function all_rcpp_labels(), which is simply all_labels(engine == 'Rcpp') and can be used to extract all chunk lables of Rcpp chunks added a new engine named sql that uses the DBI package to execute SQL queries, and optionally assign the result to a variable in the knitr session; see http://rmarkdown.rstudio.com/authoring_knitr_engines.html for details (#1241) fig.keep now accepts numeric values to index low-level plots to keep (#1265) BUG FIXES fixed #1211: pandoc('foo.md') generates foo_utf8.html instead of foo.html by default fixed #1236: include = FALSE for code chunks inside blockquotes did not work (should return > instead of a blank line) (thanks, @fmichonneau) fixed #1217: define the command \hlipl for syntax highlighting for Rnw documents (thanks, @conjugateprior) fixed #1215: restoring par() settings might fail when the plot window is partitioned, e.g. par(mfrow = c(1, 2)) (thanks, @jrwishart @jmichaelgilbert) fixed #1250: in the quiet mode, knit() should not emit the message "processing file ..." when processing child documents (thanks, @KZARCA) MAJOR CHANGES knitr will no longer generate screenshots automatically for HTML widgets if the webshot package or PhantomJS is not installed MINOR CHANGES if dev = 'cairo_pdf', the cairo_pdf device will be used to record plots (previously the pdf device was used) (#1235) LaTeX short captions now go up to the first ., : or ; character followed by a space or newline (thanks, @knokknok, #1249)
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Is it possible to add legend and label for htmlwidgets chucks? I have added some DiagrammeR figures in my book. It will be really nice we can have a legend and cross reference it.
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