Error(s) in re-building vignettes:
--- re-building ‘xkcd-intro.Rnw’ using Sweave
Error: processing vignette 'xkcd-intro.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'xkcd-intro.tex' failed.
LaTeX errors:
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.74 \begin{document}
                     
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.74 \begin{document}
                     
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.74 \begin{document}
                     
! Undefined control sequence.
<recently read> \quote@name 
                            
l.74 \begin{document}
                     
! Undefined control sequence.
<recently read> \quote@name 
                            
l.74 \begin{document}
                     
! LaTeX Error: File `jsslogo' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.89 ...ludegraphics[width=\textwidth]{convincing}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.89 ...ludegraphics[width=\textwidth]{convincing}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.89 ...ludegraphics[width=\textwidth]{convincing}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.89 ...ludegraphics[width=\textwidth]{convincing}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.89 ...ludegraphics[width=\textwidth]{convincing}
                                                  
! LaTeX Error: File `convincing' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.105 ...cludegraphics[width=\textwidth]{grpython}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.105 ...cludegraphics[width=\textwidth]{grpython}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.105 ...cludegraphics[width=\textwidth]{grpython}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.105 ...cludegraphics[width=\textwidth]{grpython}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.105 ...cludegraphics[width=\textwidth]{grpython}
                                                  
! LaTeX Error: File `grpython' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.112 ...ncludegraphics[width=\textwidth]{grlatex}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.112 ...ncludegraphics[width=\textwidth]{grlatex}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.112 ...ncludegraphics[width=\textwidth]{grlatex}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.112 ...ncludegraphics[width=\textwidth]{grlatex}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.112 ...ncludegraphics[width=\textwidth]{grlatex}
                                                  
! LaTeX Error: File `grlatex' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.155 ...ludegraphics[width=\textwidth]{grnofonts}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.155 ...ludegraphics[width=\textwidth]{grnofonts}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.155 ...ludegraphics[width=\textwidth]{grnofonts}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.155 ...ludegraphics[width=\textwidth]{grnofonts}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.155 ...ludegraphics[width=\textwidth]{grnofonts}
                                                  
! LaTeX Error: File `grnofonts' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.162 ...ncludegraphics[width=\textwidth]{grfonts}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.162 ...ncludegraphics[width=\textwidth]{grfonts}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.162 ...ncludegraphics[width=\textwidth]{grfonts}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.162 ...ncludegraphics[width=\textwidth]{grfonts}
                                                  
! Undefined control sequence.
<recently read> \quote@name 
                            
l.162 ...ncludegraphics[width=\textwidth]{grfonts}
                                                  
! LaTeX Error: File `grfonts' not found.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
\Ginclude@graphics ...\Ginput@path \set@curr@file 
                                                  {#1}\edef \uq@curr@file {\...
l.280 ...includegraphics[width=\textwidth]{graxis}
                                                  
! Undefined control sequence.
\Ginclude@graphics ...e \expandafter {\@curr@file 
                                                  }}\expandafter \filename@p...
l.280 ...includegraphics[width=\textwidth]{graxis}
                                                  
! Undefined control sequence.
<recently read> \unquote@name 
                              
l.280 ...includegraphics[width=\textwidth]{graxis}
                
--- failed re-building ‘xkcd-intro.Rnw’

SUMMARY: processing the following file failed:
  ‘xkcd-intro.Rnw’

Error: Vignette re-building failed.
Execution halted