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R/exams NOPS generates documents in Times New Roman, which then fail during scanning

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3

I have been using r/exams in some of my last exams and everything has worked fine. This semester, however, r/exams seems to generate the exams in Times New Roman instead of Helvetica, which messes with the character recognition in the scanning process.

Even the minimal example, produces this behavior:

library("exams")
myexam <- list("cholesky.Rnw")
set.seed(403)
ex1 <- exams2nops(myexam, n = 1,
 dir = "nops_pdf", name = "demo", date = "2015-07-29",
 points = c(1), showpoints = TRUE)

Does anyone have any idea what could have gone wrong? How do I see the intermediate steps? I get no error messages.

Thanks!

r exams

share|improve this question

edited Mar 8 at 9:50

André Calero Valdez

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't know the package, but there are a lot of options in ?exams2nops, have you pored over this? A quick glance shows: "Note that the font in the PDF must not be modified for the reading step to work reliably. (A sans-serif font is used and hence the codesfmath LaTeX package is also used - if it is installed.)", perhaps your latex installation is missing sfmath?
  
  – MichaelChirico
  Mar 8 at 9:56
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks for the hint. Something was missing in my TinyTex installation. It was not sfmath. I moved to MacTex and it works again!
  
  – André Calero Valdez
  Mar 8 at 10:24
  
  

  
  
  
  

add a comment | 

3

I have been using r/exams in some of my last exams and everything has worked fine. This semester, however, r/exams seems to generate the exams in Times New Roman instead of Helvetica, which messes with the character recognition in the scanning process.

Even the minimal example, produces this behavior:

library("exams")
myexam <- list("cholesky.Rnw")
set.seed(403)
ex1 <- exams2nops(myexam, n = 1,
 dir = "nops_pdf", name = "demo", date = "2015-07-29",
 points = c(1), showpoints = TRUE)

Does anyone have any idea what could have gone wrong? How do I see the intermediate steps? I get no error messages.

Thanks!

r exams

share|improve this question

edited Mar 8 at 9:50

André Calero Valdez

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I don't know the package, but there are a lot of options in ?exams2nops, have you pored over this? A quick glance shows: "Note that the font in the PDF must not be modified for the reading step to work reliably. (A sans-serif font is used and hence the codesfmath LaTeX package is also used - if it is installed.)", perhaps your latex installation is missing sfmath?
  
  – MichaelChirico
  Mar 8 at 9:56
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks for the hint. Something was missing in my TinyTex installation. It was not sfmath. I moved to MacTex and it works again!
  
  – André Calero Valdez
  Mar 8 at 10:24
  
  

  
  
  
  

add a comment | 

I have been using r/exams in some of my last exams and everything has worked fine. This semester, however, r/exams seems to generate the exams in Times New Roman instead of Helvetica, which messes with the character recognition in the scanning process.

Even the minimal example, produces this behavior:

library("exams")
myexam <- list("cholesky.Rnw")
set.seed(403)
ex1 <- exams2nops(myexam, n = 1,
 dir = "nops_pdf", name = "demo", date = "2015-07-29",
 points = c(1), showpoints = TRUE)

Does anyone have any idea what could have gone wrong? How do I see the intermediate steps? I get no error messages.

Thanks!

r exams

share|improve this question

edited Mar 8 at 9:50

André Calero Valdez

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

library("exams")
myexam <- list("cholesky.Rnw")
set.seed(403)
ex1 <- exams2nops(myexam, n = 1,
 dir = "nops_pdf", name = "demo", date = "2015-07-29",
 points = c(1), showpoints = TRUE)

share|improve this question

edited Mar 8 at 9:50

André Calero Valdez

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

share|improve this question

edited Mar 8 at 9:50

André Calero Valdez

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

asked Mar 8 at 9:41

André Calero ValdezAndré Calero Valdez

184

1 Answer
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oldest

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2

Starting from R/exams version 2.3-2 (the current CRAN version at the time of writing) it is enforced that the digits that need to be scanned are always in Helvetica (fontfamilyphv) even if the font is switched for the rest of the document.

I'm not sure though which package might have been the culprit in switching the fonts for you when using TinyTex. But I guess it would be useful to find out if others encounter the same problem.

I just went through the source code of exams2nops() to check what packages we use. Partly for historical reasons there are quite a few. Possibly these could also be streamlined.

• Basic tools: graphicx, color, amsmath, amssymb, latexsym.


• For compatibility with Sweave: verbatim, url, fancyvrb, ae.


• Layout etc.: multicol, a4wide, pdfpages, chngpage.


• For compatibility with LaTeX produced by pandoc from Markdown: booktabs, longtable, eurosym, textcomp.

share|improve this answer

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Since exams uses tools::texi2dvi(), it cannot take full advantage of tinytex and TinyTeX. If you switch to tinytex::latexmk(), missing LaTeX packages will be automatically installed in TinyTeX.
  
  – Yihui Xie
  Mar 13 at 19:57
  

  
  
  
  

add a comment | 

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2

Starting from R/exams version 2.3-2 (the current CRAN version at the time of writing) it is enforced that the digits that need to be scanned are always in Helvetica (fontfamilyphv) even if the font is switched for the rest of the document.

I'm not sure though which package might have been the culprit in switching the fonts for you when using TinyTex. But I guess it would be useful to find out if others encounter the same problem.

I just went through the source code of exams2nops() to check what packages we use. Partly for historical reasons there are quite a few. Possibly these could also be streamlined.

• Basic tools: graphicx, color, amsmath, amssymb, latexsym.


• For compatibility with Sweave: verbatim, url, fancyvrb, ae.


• Layout etc.: multicol, a4wide, pdfpages, chngpage.


• For compatibility with LaTeX produced by pandoc from Markdown: booktabs, longtable, eurosym, textcomp.

share|improve this answer

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Since exams uses tools::texi2dvi(), it cannot take full advantage of tinytex and TinyTeX. If you switch to tinytex::latexmk(), missing LaTeX packages will be automatically installed in TinyTeX.
  
  – Yihui Xie
  Mar 13 at 19:57
  

  
  
  
  

add a comment | 

2

Starting from R/exams version 2.3-2 (the current CRAN version at the time of writing) it is enforced that the digits that need to be scanned are always in Helvetica (fontfamilyphv) even if the font is switched for the rest of the document.

I'm not sure though which package might have been the culprit in switching the fonts for you when using TinyTex. But I guess it would be useful to find out if others encounter the same problem.

I just went through the source code of exams2nops() to check what packages we use. Partly for historical reasons there are quite a few. Possibly these could also be streamlined.

• Basic tools: graphicx, color, amsmath, amssymb, latexsym.


• For compatibility with Sweave: verbatim, url, fancyvrb, ae.


• Layout etc.: multicol, a4wide, pdfpages, chngpage.


• For compatibility with LaTeX produced by pandoc from Markdown: booktabs, longtable, eurosym, textcomp.

share|improve this answer

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Since exams uses tools::texi2dvi(), it cannot take full advantage of tinytex and TinyTeX. If you switch to tinytex::latexmk(), missing LaTeX packages will be automatically installed in TinyTeX.
  
  – Yihui Xie
  Mar 13 at 19:57
  

  
  
  
  

add a comment | 

Starting from R/exams version 2.3-2 (the current CRAN version at the time of writing) it is enforced that the digits that need to be scanned are always in Helvetica (fontfamilyphv) even if the font is switched for the rest of the document.

I'm not sure though which package might have been the culprit in switching the fonts for you when using TinyTex. But I guess it would be useful to find out if others encounter the same problem.

I just went through the source code of exams2nops() to check what packages we use. Partly for historical reasons there are quite a few. Possibly these could also be streamlined.

• Basic tools: graphicx, color, amsmath, amssymb, latexsym.


• For compatibility with Sweave: verbatim, url, fancyvrb, ae.


• Layout etc.: multicol, a4wide, pdfpages, chngpage.


• For compatibility with LaTeX produced by pandoc from Markdown: booktabs, longtable, eurosym, textcomp.

share|improve this answer

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027

share|improve this answer

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027

answered Mar 8 at 22:15

Achim ZeileisAchim Zeileis

6,62612027