当路径包含“〜"时，R Markdown编织失败.适用于html/pdf文档，但适用于ioslides [英] R Markdown knit fails when path includes "~" for html/pdf document but works for ioslides
问题描述
从knitr 1.12开始，具有功能include_graphics.来自?include_graphics:
As of knitr 1.12, there is the function include_graphics. From ?include_graphics:
使用此功能的主要优点是它可以在 它适用于knitr支持的所有文档格式的意义， 因此您无需考虑是否需要使用，例如LaTeX或 Markdown语法，用于嵌入外部图像.
The major advantage of using this function is that it is portable in the sense that it works for all document formats that knitr supports, so you do not need to think if you have to use, for example, LaTeX or Markdown syntax, to embed an external image.
在编织ioslides Rmarkdown演示文稿时，似乎include_graphics()处理路径中带有〜"的路径(到用户目录的快捷方式)，但是在编织word/html文档时失败.
It seems that include_graphics() handles paths with "~" in them (shortcut to user directory) when knitting an ioslides Rmarkdown presentation, but fails when knitting a word/html document.
ioslide的可复制示例(请注意，这些示例会将Rlogo.png的副本复制到您的桌面上:
Reproducible example for ioslides (note that these will make a copy of the Rlogo.png onto your desktop:
---
title: "Rlogo ioslides"
output: ioslides_presentation
---
## Images?
```{r}
require(knitr)
rlogo <- paste0(.libPaths(), "/png/img/Rlogo.png")
include_graphics(rlogo)
file.copy(from = rlogo, to = "~/Desktop")
include_graphics("~/Desktop/Rlogo.png")
```
处理文件:rlogo.Rmd
processing file: rlogo.Rmd
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc + RTS -K512m -RTS rlogo.utf8.md --to html --from markdown + autolink_bare_uris + ascii_identifiers + tex_math_single_backslash --output rlogo.html-智能-电子邮件混淆无-自包含-变量转换= 0.4-模板/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rmarkdown/rmd/ioslides/default.html --include-in-header/var/folders/5_/l71sk6kn29z17n011g8kld5m0000gp/T//RtmpKAAz4I/rmarkdown-str91efb7c6c16.html --mathjax --variable'mathjax-url: https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML ' 输出文件:rlogo.knit.md
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc +RTS -K512m -RTS rlogo.utf8.md --to html --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output rlogo.html --smart --email-obfuscation none --self-contained --variable transition=0.4 --template /Library/Frameworks/R.framework/Versions/3.3/Resources/library/rmarkdown/rmd/ioslides/default.html --include-in-header /var/folders/5_/l71sk6kn29z17n011g8kld5m0000gp/T//RtmpKAAz4I/rmarkdown-str91efb7c6c16.html --mathjax --variable 'mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML' output file: rlogo.knit.md
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc + RTS -K512m -RTS rlogo.utf8.md-至ioslides_presentation.lua-来自markdown + autolink_bare_uris + ascii_identifiers + tex_math_single_backslash --output/var/folders/5_/l71sk6kn29z17n011g8kld5m0000gp/T//RtmpKAAz4I/ioslides-output91ef159c1e3e.html --slide-level 2
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc +RTS -K512m -RTS rlogo.utf8.md --to ioslides_presentation.lua --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output /var/folders/5_/l71sk6kn29z17n011g8kld5m0000gp/T//RtmpKAAz4I/ioslides-output91ef159c1e3e.html --slide-level 2
创建的输出:rlogo.html
Output created: rlogo.html
Word/html文档的可复制失败:
And reproducible failure for word/html document:
---
title: "Rlogo word/html"
output:
html_document: default
word_document: default
---
## Images?
```{r}
require(knitr)
rlogo <- paste0(.libPaths(), "/png/img/Rlogo.png")
include_graphics(rlogo)
file.copy(from = rlogo, to = "~/Desktop")
include_graphics("~/Desktop/Rlogo.png")
```
处理文件:rlogo.Rmd
processing file: rlogo.Rmd
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc + RTS -K512m -RTS rlogo.utf8.md --to html --from markdown + autolink_bare_uris + ascii_identifiers + tex_math_single_backslash --output rlogo.html --smart --email-obfuscation none --self-contained --standalone --section-divs --template/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rmarkdown/rmd/h/default.html --no-highlight --variable highlightjs = 1 --variable'theme:bootstrap'--include-in-header/var/folders/5_/l71sk6kn29z17n011g8kld5m0000gp/T//RtmpCR2Vrn/rmarkdown-str91681de2b0f3.html --mathjax --variable'mathjax-url: https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML ' 输出文件:rlogo.knit.md
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc +RTS -K512m -RTS rlogo.utf8.md --to html --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output rlogo.html --smart --email-obfuscation none --self-contained --standalone --section-divs --template /Library/Frameworks/R.framework/Versions/3.3/Resources/library/rmarkdown/rmd/h/default.html --no-highlight --variable highlightjs=1 --variable 'theme:bootstrap' --include-in-header /var/folders/5_/l71sk6kn29z17n011g8kld5m0000gp/T//RtmpCR2Vrn/rmarkdown-str91681de2b0f3.html --mathjax --variable 'mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML' output file: rlogo.knit.md
pandoc:无法获取〜/Desktop/Rlogo.png〜/Desktop/Rlogo.png: openBinaryFile:不存在(没有这样的文件或目录)错误: pandoc文档转换失败，错误67，执行暂停
pandoc: Could not fetch ~/Desktop/Rlogo.png ~/Desktop/Rlogo.png: openBinaryFile: does not exist (No such file or directory) Error: pandoc document conversion failed with error 67 Execution halted
我正在使用MacOS Sierra.
I'm using MacOS Sierra.
为什么在一种情况下失败，而在另一种情况下失败?
Why is this failing in one case but not the other?
推荐答案
如果您使用path.expand('~/path')，应该可以.问题是~的分辨率.一些函数为您调用path.expand-其他函数可能需要您自己执行.如果事物是相对设置的，则可以选择相对路径或相对路径.我更喜欢相对路径方法，因为它在R和github等上都能很好地工作.
Should work if you use path.expand('~/path') instead, I would expect. The problem is the resolution of the ~. Some functions call path.expand for you - others might require you to do it yourself. That or relative paths are an option if things are set up relatively. I prefer the relative path approach because it works nicely in R and with github, etc.
根据@yihui的响应-normalizePath是另一个可以保持的工具记住.
Per @yihui's response - normalizePath is another tool to keep in mind.
在您的示例中:
...
include_graphics(path.expand("~/Desktop/Rlogo.png"))
...
这篇关于当路径包含“〜"时，R Markdown编织失败.适用于html/pdf文档，但适用于ioslides的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
