Error(s) in re-building vignettes:
  ...
--- re-building ‘examples.Rnw’ using knitr
Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-02'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-03'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-04'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-05'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-06'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-07'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-08'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-010'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-11'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R13'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-16'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-17'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.


	Two-sided Wald test

data:  lau and jackson
z = 1.1923, p-value = 0.2331
alternative hypothesis: true difference in shape parameters is not equal to 0
sample estimates:
    Shape of lau Shape of jackson 
        5.885919         4.533556 

Error: processing vignette 'examples.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'examples.tex' failed.
LaTeX errors:
! Undefined control sequence.
l.78 \hldef
           {> }\hlkwd{data}\hldef{(}\hlsng{"Psurveys"}\hldef{)}
? 
! Emergency stop.
! Emergency stop.
l.78 
     
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘examples.Rnw’

--- re-building ‘simple_P_fit.Rnw’ using knitr
Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-02'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-03'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-04'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-05'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-06'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Warning in eng_r(options) :
  Failed to tidy R code in chunk 'R-07'. Reason:
Error : The formatR package is required by the chunk option tidy = TRUE but not installed; tidy = TRUE will be ignored.

Error: processing vignette 'simple_P_fit.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'simple_P_fit.tex' failed.
LaTeX errors:
! Undefined control sequence.
l.89 \hldef
           {> }\hlkwd{data}\hldef{(}\hlsng{"Psurveys"}\hldef{)}
? 
! Emergency stop.
! Emergency stop.
l.89 
     
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘simple_P_fit.Rnw’

SUMMARY: processing the following files failed:
  ‘examples.Rnw’ ‘simple_P_fit.Rnw’

Error: Vignette re-building failed.
Execution halted