R Sweave 如何使用 Computer Modern 字体

Question

我已经安装了R包extrafont和fontcm。然后尝试在Sweave中使用Computer Modern字体绘制数据：

<<test,fig=TRUE,echo=False>>=
plot(na, family="CM Roman")
@

但是它出现了错误：

> grDevices::pdf.options(useDingbats = FALSE); utils::Sweave('test.Rnw', encoding='UTF-8')
Writing to file test.tex
Processing code chunks with options ...
 1 : echo keep.source term verbatim (test.Rnw:76)
 2 : keep.source term verbatim pdf  (label = test, test.Rnw:80)

Error:  chunk 2 (label = test) 
Error in axis(side = side, at = at, labels = labels, ...) : 
  invalid font type
In addition: Warning messages:
1: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
2: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
3: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
4: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
5: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
6: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
7: In axis(side = side, at = at, labels = labels, ...) :
  font family 'CM Roman' not found in PostScript font database
Error in rle(filenames) : 'x' must be an atomic vector
Calls: <Anonymous> -> <Anonymous> -> RweaveTryStop
Execution halted

loadfonts(device="postscript") 显示字体已经 与 postscriptFonts() 注册

我该如何在 Sweave 中使用它？

- m0nhawk

Answer 1

您确定使用的是正确的名称吗？尝试一下以下方法，查看结果是否有信息：

> names(postscriptFonts() )
 [1] "serif"                "sans"                 "mono"                 "AvantGarde"          
 [5] "Bookman"              "Courier"              "Helvetica"            "Helvetica-Narrow"    
 [9] "NewCenturySchoolbook" "Palatino"             "Times"                "URWGothic"           
[13] "URWBookman"           "NimbusMon"            "NimbusSan"            "URWHelvetica"        
[17] "NimbusSanCond"        "CenturySch"           "URWPalladio"          "NimbusRom"           
[21] "URWTimes"             "ComputerModern"       "ComputerModernItalic" "Japan1"              
[25] "Japan1HeiMin"         "Japan1GothicBBB"      "Japan1Ryumin"         "Korea1"              
[29] "Korea1deb"            "CNS1"                 "GB1"                 

经过审查，我发现pdf.options已被涉及，您可能还需要检查：

 > names( pdfFonts() )

- IRTFM

Answer 2

这似乎是一个愚蠢而简单的问题。我需要在我的Sweave文件中加载extrafont和fontcm包：

<<setup,echo=FALSE>>=
    library(extrafont)
    library(fontcm)
@

- m0nhawk