我的r-scipt正在以下列方式产生PDF
...
baseplot
和ggplot
制作100多张图表。图表是使用pdf
设备生成的。我使用pdf
的原因是我需要嵌入字体(在tex标签中使用自定义字体)。Sweave
生成.tex
以将所有图表收集在一起。MikTeX
生成PDF。事实证明,生成图表所需的时间是embed_fonts
调用的75-95%。有没有办法减少embed_fonts
(似乎是ghostscript的包装)调用?理想的价值是只召唤一次电话。这可能吗?
答案 0 :(得分:3)
也许您可以使用应该嵌入字体的cairo_pdf
设备
cairo_pdf
似乎比pdf
慢,但比pdf + embedFonts
快。
当然,在最终的pdf文档中嵌入字体只是一个更好的解决方案......
library(microbenchmark)
res_pdf <- microbenchmark({
f = tempfile(fileext = '.pdf')
pdf(f); pairs(iris); dev.off()
})
res_embed <- microbenchmark({
f = tempfile(fileext = '.pdf')
pdf(f); pairs(iris); dev.off()
embedFonts(f)
})
res_cairo <- microbenchmark({
f = tempfile(fileext = '.pdf')
cairo_pdf(f); pairs(iris); dev.off()
})
res_pdf
#> Unit: milliseconds
#> min lq mean median uq max neval
#> 16.67764 17.0388 18.05949 17.32904 18.18776 60.2542 100
res_embed
#> Unit: milliseconds
#>
#> min lq mean median uq max neval
#> 250.046 252.7647 257.4749 255.2785 259.4858 303.0072 100
res_cairo
#> Unit: milliseconds
#>
#> min lq mean median uq max neval
#> 84.25745 86.60512 88.42902 88.36698 89.5705 111.5881 100
答案 1 :(得分:1)
另一种解决方案是使用优秀的tikzDevice
包将图表输出为TikZ。
在rmarkdown文档中,我们可以添加knitr数据块,设备设置为tikz
。
---
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)
```
您可以使用设置所选字体所需的乳胶命令替换\renewcommand{\familydefault}{\sfdefault}
,例如\usepackage{charter}
。请注意,您必须转义\
,如上例所示。
您可能希望使用另一个脚本提前生成所有绘图,因为您有很多,而不是在生成文档时内联编织。我这样做是为了大量报告(1,000+),每个报告大约有20个图。
# a more simple example due to output size
library(tikzDevice)
mpg <- mtcars$mpg
tikz(file = "example.tex"); hist(mpg); dev.off()
% 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}
N.B。这不是一个完整的
.tex
文件,而是设计为使用\input{example.tex}
或以其他方式嵌入到完整文档中。另外,请注意字体度量计算,如果指标明显不同,保存的.tex
文件可能会使用不同的字体呈现奇怪的效果。
答案 2 :(得分:0)
我尝试对{3}生成的embed_fonts
进行操作,而不是在步骤1中生成的每个图表上调用它,这似乎没问题