无法使用Blogdown在我的.Rmd帖子中添加tikz代码段 [英] Cannot add tikz code snippet in my .Rmd post using blogdown

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问题描述

我刚刚开始使用 blogdown ,并且我已经通过使用模板 Hugo-Xmin .在RStudio中,在Blogdown中创建项目时,它创建了一些预定义的帖子,我正在编辑此帖子:

I have just started using blogdown and I have created a project by using template Hugo-Xmin. In RStudio, when creating the project in blogdown, it created some predefined posts, I am editing this one:

/content/post/2015-07-23-r-rmarkdown.Rmd

添加tikz图像

此问题

Adding a tikz image

Following this question and the bookdown documentation on engines, I modified the afore-mentioned file by adding this snippet:

This is a tikz picture:

```{r, echo=FALSE, engine='tikz', out.width='90%', fig.ext=if (knitr:::is_latex_output()) 'pdf' else 'png', fig.cap='Some caption.'}
\begin{tikzpicture}[scale=.7]
\draw [fill=gray!30,very thick] (0,-1) rectangle (5,1);
\draw [very thick] (5, 0) -- (13,0);
\node [below] at (2,-1) {\large Hello};
\node [below, align=center] at (0,-1) {\large Two\\ lines};
\end{tikzpicture}
```

无法处理帖子

保存后(因为我启用了serve),但是当使用blogdown::build_site()时,我也得到了:

Failed to process the post

As soon as I save (since I have the serve on), but also when using blogdown::build_site(), I get this:

> blogdown::serve_site()
Rendering content/post/2015-07-23-r-rmarkdown.Rmd
This is pdfTeX, Version 3.14159265-2.6-1.40.19 (TeX Live 2018/W32TeX) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
Quitting from lines 49-55 (2015-07-23-r-rmarkdown.Rmd) 
Error: Failed to compile .\tikz53878cd6189.tex. See https://yihui.name/tinytex/r/#debugging for debugging tips.
Execution halted
Error in render_page(f) : 
  Failed to render 'content/post/2015-07-23-r-rmarkdown.Rmd'


问题排查

我检查了引擎,发现tikz实际上在其中:


Troubleshooting

I checked my engines and saw that tikz is actually among them:

> names(knitr::knit_engines$get())
 [1] "awk"         "bash"        "coffee"      "gawk"        "groovy"      "haskell"     "lein"        "mysql"      
 [9] "node"        "octave"      "perl"        "psql"        "Rscript"     "ruby"        "sas"         "scala"      
[17] "sed"         "sh"          "stata"       "zsh"         "highlight"   "Rcpp"        "tikz"        "dot"        
[25] "c"           "fortran"     "fortran95"   "asy"         "cat"         "asis"        "stan"        "block"      
[33] "block2"      "js"          "css"         "sql"         "go"          "python"      "julia"       "theorem"    
[41] "lemma"       "corollary"   "proposition" "conjecture"  "definition"  "example"     "exercise"    "proof"      
[49] "remark"      "solution"  

文档说,有些引擎是按书本发货的,而不是knitr,但我可以看到tikz在里面!所以我有引擎,但仍然无法使用.我在做什么错了?

The documentation said that some engines are shipped in bookdown and not knitr, but I can see tikz is there! So I have the engine, but still I cannot use it. What am I doing wrong?

生成一个日志文件/content/post/texput.log,并报告有关失败的信息:

A log file /content/post/texput.log is generated and reports this info on the failure:

This is pdfTeX, Version 3.14159265-2.6-1.40.19 (TeX Live 2018/W32TeX) (preloaded format=pdflatex 2019.1.11)  25 FEB 2019 07:54
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**.\tikz3cac449b1071.tex

! Emergency stop.
<*> .\tikz3cac449b1071.tex

*** (job aborted, file error in nonstop mode)


Here is how much of TeX's memory you used:
 3 strings out of 492616
 115 string characters out of 6132768
 56950 words of memory out of 5000000
 4017 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 0i,0n,0p,1b,6s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!

如果我选中knitr:

> xfun::session_info('knitr')
R version 3.5.2 (2018-12-20)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200), RStudio 1.1.463

Locale:
  LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
  LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
  LC_TIME=English_United States.1252    

Package version:
  evaluate_0.13   glue_1.3.0      graphics_3.5.2  grDevices_3.5.2 highr_0.7       knitr_1.21.13  
  magrittr_1.5    markdown_0.9    methods_3.5.2   mime_0.6        stats_3.5.2     stringi_1.3.1  
  stringr_1.4.0   tools_3.5.2     utils_3.5.2     xfun_0.5        yaml_2.2.0

推荐答案

这实际上是 knitr 中的一个问题,其中

This turns out to be an issue in knitr which I just fixed on Github (I'm not sure if it is a bug of pdflatex). You may try

remotes::install_github('yihui/knitr')

请注意,如果尚未安装两个R软件包,请安装 magick pdftools .

Note that you will need to install two additional R packages, magick and pdftools, if they haven't been installed yet.

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