Error(s) in re-building vignettes:
  ...
--- re-building ‘tboot.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/tboot.Rcheck/vign_test/tboot/vignettes/tboot_files/figure-html/hist-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 12190 bytes
Input file size = 12280 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 9400
  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 = 9400

Output IDAT size = 9400 bytes (2790 bytes decrease)
Output file size = 9478 bytes (2802 bytes = 22.82% decrease)


Quitting from lines 105-112 [boot21] (tboot.Rmd)
Error: processing vignette 'tboot.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘tboot.Rmd’

--- re-building ‘tboot_bmr.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/tboot.Rcheck/vign_test/tboot/vignettes/tboot_bmr_files/figure-html/pairsgraph-1.png
576x576 pixels, 8 bits/pixel, 256 colors in palette
Input IDAT size = 14861 bytes
Input file size = 15731 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 13240
  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 = 13240

Output IDAT size = 13240 bytes (1621 bytes decrease)
Output file size = 14098 bytes (1633 bytes = 10.38% decrease)


Quitting from lines 66-83 [marginal dist] (tboot_bmr.Rmd)
Error: processing vignette 'tboot_bmr.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘tboot_bmr.Rmd’

SUMMARY: processing the following files failed:
  ‘tboot.Rmd’ ‘tboot_bmr.Rmd’

Error: Vignette re-building failed.
Execution halted