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我想在图表中使用免费字体Latoggplot2 ,因为我的 R markdown 文档的其余部分都是用这种字体设置的。

该字体安装在我的系统上并在字体册中可用(仅一次)。

extrafont所有可用字体都与包一起加载并在extrafontdb.

当我将 Markdown 文档编织为 PDF 时,所有文本都正确排版为Lato. 但是,我的 ggPlots 的绘图标签没有显示。

我还收到以下警告消息:

Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y, : font width unknown for character 0x20

嵌入文档中包含的字体后,所有使用as 字体extrafont::embed_fonts的图形都显示了绘图标签,但是Lato

  • 情节标签不包含单词之间的任何空格,
  • 任何引用(内部链接、URL、引文)都不再起作用。

下面提供了一个 MWE,包括带有和不带有 Lato 字体的 ggPlot 图形(Lato 可在此处免费获得)要在之后嵌入字体,需要运行embed_fonts("TestRmd.pdf", outfile="TestRmd_embedded.pdf")

任何帮助是极大的赞赏!

MWE:

---
title: "Embedding Fonts in PDF"
output: pdf_document
urlcolor: blue
---

```{r echo=FALSE}
library(ggplot2)
```

### Plot with standard font {#standard}
```{r echo=FALSE, out.width = '30%'}
ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() +     
  ggtitle("Fuel Efficiency of 32 Cars") +
  xlab("Weight (x1000 lb)") + ylab("Miles per Gallon")
```

### Load fonts and set font for ggplots globally
```{r include=FALSE}
# install.packages("extrafont") # see https://github.com/wch/extrafont/
library(extrafont)
# font_import()   # run once
loadfonts()       # loadfonts

# globally set ggplot2 theme and font ("Lato Light")
theme_set(theme_minimal(base_size=12, base_family="Lato Light"))
```

### Plot with newly set standard font (= Lato) {#lato}
```{r echo=FALSE, out.width = '30%'}
ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() +     
  ggtitle("Fuel Efficiency of 32 Cars") +
  xlab("Weight (x1000 lb)") + ylab("Miles per Gallon")
```

### Plot with Impact font {#impact}
```{r echo=FALSE, out.width = '30%'}
ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() +
  ggtitle("Fuel Efficiency of 32 Cars") +
  xlab("Weight (x1000 lb)") + ylab("Miles per Gallon") +
  theme(text=element_text(size=16, family="Impact"))
```

### Run to embed fonts
```{r eval=FALSE, include=TRUE}
embed_fonts("TestRmd.pdf", outfile="TestRmd_embedded.pdf")
```

### Links test

Links test 1 (internal reference): [Headline standard](#standard)

Links test 2 (URL): [RStudio has become a Public Benefit Corporation](https://blog.rstudio.com/2020/01/29/rstudio-pbc)

添加在:

一个更简单的问题,但可能与同一问题有关:

library(extrafont)
extrafont::font_import()
p <- ggplot(iris, aes(Sepal.Length, Sepal.Width)) + geom_point() + theme_minimal(base_size=10, base_family="Lato Light")
ggsave(p, filename = "iris.pdf")

保存的 pdf 中的绘图不包含任何标签。cairo_pdf在几个 SO(例如12 )站点上使用建议并没有帮助并导致以下错误:

ggsave(p, filename = "iris.pdf", device = cairo_pdf)
# In dev(filename = filename, width = dim[1], height = dim[2], ...) :
#   failed to load cairo DLL
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1 回答 1

2

我试图让它工作,extrafont但没有成功。我仍然不太确定,但我认为这是一个错误。这是使用包的解决方案showtext

---
title: "Embedding Fonts in PDF"
output: pdf_document
urlcolor: blue
---

```{r include=FALSE}
# notice the chunk option 'fig.showtext' that tells R to use the showtext 
# functionalities for each ne graphics device opened
knitr::opts_chunk$set(dev = 'pdf', cache = FALSE, fig.showtext = TRUE)

library(ggplot2)
library(showtext)

font_add(family = "Lato", regular = "/Users/martin/Library/Fonts/Lato-Light.ttf") 
```


### Plot with newly set standard font (= Lato) {#lato}
```{r echo=FALSE, out.width = '100%'}
ggplot(mtcars, aes(x=wt, y=mpg)) + 
  geom_point() +     
  ggtitle("Fuel Efficiency of 32 Cars") + 
  xlab("Weight (x1000 lb)") + 
  ylab("Miles per Gallon") + 
  theme(text = element_text(family="Lato"))
```

在此处输入图像描述

于 2020-06-04T17:58:53.390 回答