Error(s) in re-building vignettes:
  ...
--- re-building ‘intro-to-anscombiser.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/anscombiser.Rcheck/vign_test/anscombiser/vignettes/intro-to-anscombiser_files/figure-html/unnamed-chunk-2-1.png
672x672 pixels, 8 bits/pixel, 254 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 7640 bytes
Input file size = 8492 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 6671
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 6646
  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 = 1  f = 0		IDAT size = 6646

Output IDAT size = 6646 bytes (994 bytes decrease)
Output file size = 6724 bytes (1768 bytes = 20.82% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/anscombiser.Rcheck/vign_test/anscombiser/vignettes/intro-to-anscombiser_files/figure-html/anscombe-1.png
672x672 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 11101 bytes
Input file size = 11968 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 9838
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 9827
  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 = 1  f = 0		IDAT size = 9827

Output IDAT size = 9827 bytes (1274 bytes decrease)
Output file size = 9905 bytes (2063 bytes = 17.24% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/anscombiser.Rcheck/vign_test/anscombiser/vignettes/intro-to-anscombiser_files/figure-html/anscombe-2.png
672x672 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 7158 bytes
Input file size = 8016 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 6379
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 6339
  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 = 1  f = 0		IDAT size = 6339

Output IDAT size = 6339 bytes (819 bytes decrease)
Output file size = 6417 bytes (1599 bytes = 19.95% decrease)


Quitting from lines 62-65 [italy] (intro-to-anscombiser.Rmd)
Error: processing vignette 'intro-to-anscombiser.Rmd' failed with diagnostics:
there is no package called 'maps'
--- failed re-building ‘intro-to-anscombiser.Rmd’

SUMMARY: processing the following file failed:
  ‘intro-to-anscombiser.Rmd’

Error: Vignette re-building failed.
Execution halted