我是使用knitr和Latex创建文档的新手，我正在慢慢地疯狂地试图弄清楚为什么编译的pdf中缺少图形的图像。
例如，如果我打开knitr包（v1.5）附带的knitr最小示例（存储在本地R安装目录.... \library\knitr\examples\knitr-minimal.Rnw中）并从RStudio（版本0.98.490）中编译它，我得到一个pdf文件（saved here），它缺少示例图像，但在其他方面是正确的。
我可以在哪些想法中找出导致此问题的原因？
会话信息
> R version 3.0.2 (2013-09-25)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
>
> locale:
> (1) LC_COLLATE=English_Ireland.1252 LC_CTYPE=English_Ireland.1252
> (3) LC_MONETARY=English_Ireland.1252 LC_NUMERIC=C
> (5) LC_TIME=English_Ireland.1252
>
> attached base packages:
> (1) stats graphics grDevices utils datasets methods base
>
> loaded via a namespace (and not attached):
> (1) tools_3.0.2
在RStudio中编译pdf的输出：
> grDevices::pdf.options(useDingbats = FALSE); utils::Sweave('knitr-minimal.Rnw', encoding='ISO8859-1')
>Writing to file knitr-minimal.tex
>Processing code chunks with options ...
> 1 : echo keep.source term verbatim (label = setup, knitr-minimal.Rnw:21)
> 2 : echo keep.source term verbatim (label = boring-random, knitr-minimal.Rnw:38)
> 3 : echo keep.source term verbatim (label = boring-plots, knitr-minimal.Rnw:47)
>
>You can now run (pdf)latex on 'knitr-minimal.tex'
>
>
>Running pdflatex.exe on knitr-minimal.tex...completed
>
>Created PDF: C:/Program Files/R/R-3.0.2/library/knitr/examples/knitr-minimal.pdf
>
>Issues: 1 warning
可怕的长乳胶编制日志
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>
答案 0 :(得分：9)
在RStudio中，需要将默认编织选项从Sweave更改为knitr。在Windows 7中，我选择工具选项卡，全局选项选项卡，Sweave选项卡，然后将“Sweave”defalut更改为“knitr”。