另一种解决方案是使用出色的 tikzDevice 包将您的图输出为 TikZ。
从rmarkdown 文档中，我们可以包含一个knitr 块，并将设备设置为tikz。
example.Rmd
---
output:
pdf_document:
latex_engine: xelatex
header-includes:
- \renewcommand{\familydefault}{\sfdefault}
- \usepackage{tikz}
---
```{r setup, include=FALSE}
library(tikzDevice)
# setting the package options so that the font metrics are calculated correctly
options(
tikzLatexPackages = c(
getOption("tikzLatexPackages"),
"\\renewcommand{\\familydefault}{\\sfdefault}"
)
)
```
# My plot
This text will be set in the default *sans serif* and so will the text found
within the chart below.
```{r, echo=FALSE, dev='tikz'}
pairs(iris)
```
您可以将我的\renewcommand{\familydefault}{\sfdefault} 替换为设置所选字体所需的任何乳胶命令，例如\usepackage{charter}。请注意，您必须像上面的示例一样转义 \。
example.pdf
另类
鉴于您有这么多的脚本，您可能希望提前使用另一个脚本生成所有绘图，而不是在文档生成时内联编织。我这样做是为了生成大量报告（1,000 多份），每份报告包含大约 20 个图。
# a more simple example due to output size
library(tikzDevice)
mpg <- mtcars$mpg
tikz(file = "example.tex"); hist(mpg); dev.off()
example.tex
% Created by tikzDevice version 0.10.1.2 on 2018-02-21 23:32:57
% !TEX encoding = UTF-8 Unicode
\begin{tikzpicture}[x=1pt,y=1pt]
\definecolor{fillColor}{RGB}{255,255,255}
\path[use as bounding box,fill=fillColor,fill opacity=0.00] (0,0) rectangle (216.81,216.81);
\begin{scope}
\path[clip] ( 0.00, 0.00) rectangle (216.81,216.81);
\definecolor{drawColor}{RGB}{0,0,0}
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.20] at (120.41,188.07) {\bfseries Histogram of mpg};
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at (120.41, 15.60) {mpg};
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 10.80,114.41) {Frequency};
\end{scope}
\begin{scope}
\path[clip] ( 0.00, 0.00) rectangle (216.81,216.81);
\definecolor{drawColor}{RGB}{0,0,0}
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 54.47, 61.20) -- (186.34, 61.20);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 54.47, 61.20) -- ( 54.47, 55.20);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 80.85, 61.20) -- ( 80.85, 55.20);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (107.22, 61.20) -- (107.22, 55.20);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (133.59, 61.20) -- (133.59, 55.20);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (159.96, 61.20) -- (159.96, 55.20);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (186.34, 61.20) -- (186.34, 55.20);
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 54.47, 39.60) {10};
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 80.85, 39.60) {15};
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at (107.22, 39.60) {20};
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at (133.59, 39.60) {25};
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at (159.96, 39.60) {30};
\node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at (186.34, 39.60) {35};
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20, 65.14) -- ( 49.20,163.67);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20, 65.14) -- ( 43.20, 65.14);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20, 81.56) -- ( 43.20, 81.56);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20, 97.98) -- ( 43.20, 97.98);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20,114.40) -- ( 43.20,114.40);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20,130.83) -- ( 43.20,130.83);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20,147.25) -- ( 43.20,147.25);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 49.20,163.67) -- ( 43.20,163.67);
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 34.80, 65.14) {0};
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 34.80, 81.56) {2};
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 34.80, 97.98) {4};
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 34.80,114.40) {6};
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 34.80,130.83) {8};
\node[text=drawColor,rotate= 90.00,anchor=base,inner sep=0pt, outer sep=0pt, scale= 1.00] at ( 34.80,147.25) {10};
\end{scope}
\begin{scope}
\path[clip] ( 49.20, 61.20) rectangle (191.61,167.61);
\definecolor{drawColor}{RGB}{0,0,0}
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 54.47, 65.14) rectangle ( 80.85,114.40);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] ( 80.85, 65.14) rectangle (107.22,163.67);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (107.22, 65.14) rectangle (133.59,130.83);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (133.59, 65.14) rectangle (159.96, 81.56);
\path[draw=drawColor,line width= 0.4pt,line join=round,line cap=round] (159.96, 65.14) rectangle (186.34, 97.98);
\end{scope}
\end{tikzpicture}
注意这不是一个完整的 .tex 文件，而是设计为使用 \input{example.tex} 引入或嵌入到完整的文档中。另外，请注意字体度量计算，如果度量明显超出，保存的.tex 文件可能会以不同的字体呈现出奇怪的效果。