Error(s) in re-building vignettes:
  ...
--- re-building ‘pagenum_examples.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pagenum.Rcheck/vign_test/pagenum/vignettes/pagenum_examples_files/figure-html/base-1.png
576x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 34329 bytes
Input file size = 34455 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27003
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27003

Output IDAT size = 27003 bytes (7326 bytes decrease)
Output file size = 27081 bytes (7374 bytes = 21.40% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pagenum.Rcheck/vign_test/pagenum/vignettes/pagenum_examples_files/figure-html/multi-1.png
576x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 51851 bytes
Input file size = 52001 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 39857
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 39857

Output IDAT size = 39857 bytes (11994 bytes decrease)
Output file size = 39935 bytes (12066 bytes = 23.20% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pagenum.Rcheck/vign_test/pagenum/vignettes/pagenum_examples_files/figure-html/lattice-1.png
576x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 34887 bytes
Input file size = 35013 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 28602
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 28602

Output IDAT size = 28602 bytes (6285 bytes decrease)
Output file size = 28680 bytes (6333 bytes = 18.09% decrease)


Quitting from lines 66-71 [ggplot] (pagenum_examples.Rmd)
Error: processing vignette 'pagenum_examples.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘pagenum_examples.Rmd’

SUMMARY: processing the following file failed:
  ‘pagenum_examples.Rmd’

Error: Vignette re-building failed.
Execution halted