Error(s) in re-building vignettes:
  ...
--- re-building ‘vignette.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pbm.Rcheck/vign_test/pbm/vignettes/vignette_files/figure-html/unnamed-chunk-1-1.png
480x336 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 6027 bytes
Input file size = 6882 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 5168
  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 = 5168

Output IDAT size = 5168 bytes (859 bytes decrease)
Output file size = 5246 bytes (1636 bytes = 23.77% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pbm.Rcheck/vign_test/pbm/vignettes/vignette_files/figure-html/unnamed-chunk-2-1.png
480x336 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5723 bytes
Input file size = 6581 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4914
  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 = 4914

Output IDAT size = 4914 bytes (809 bytes decrease)
Output file size = 4992 bytes (1589 bytes = 24.15% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pbm.Rcheck/vign_test/pbm/vignettes/vignette_files/figure-html/unnamed-chunk-3-1.png
480x336 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5820 bytes
Input file size = 6678 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 5043
  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 = 5043

Output IDAT size = 5043 bytes (777 bytes decrease)
Output file size = 5121 bytes (1557 bytes = 23.32% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/pbm.Rcheck/vign_test/pbm/vignettes/vignette_files/figure-html/unnamed-chunk-4-1.png
480x336 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 28366 bytes
Input file size = 28480 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 23276
  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 = 23276

Output IDAT size = 23276 bytes (5090 bytes decrease)
Output file size = 23354 bytes (5126 bytes = 18.00% decrease)


Quitting from lines 119-144 [unnamed-chunk-7] (vignette.Rmd)
Error: processing vignette 'vignette.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘vignette.Rmd’

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

Error: Vignette re-building failed.
Execution halted