Error(s) in re-building vignettes:
  ...
--- re-building ‘An_Introduction_to_Isolation_Forests.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/isotree.Rcheck/vign_test/isotree/vignettes/An_Introduction_to_Isolation_Forests_files/figure-html/unnamed-chunk-3-1.png
672x422 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 28931 bytes
Input file size = 29045 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 23255
  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 = 23255

Output IDAT size = 23255 bytes (5676 bytes decrease)
Output file size = 23333 bytes (5712 bytes = 19.67% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/isotree.Rcheck/vign_test/isotree/vignettes/An_Introduction_to_Isolation_Forests_files/figure-html/unnamed-chunk-4-1.png
960x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 87273 bytes
Input file size = 87471 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 63971
  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 = 63971

Output IDAT size = 63971 bytes (23302 bytes decrease)
Output file size = 64049 bytes (23422 bytes = 26.78% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/isotree.Rcheck/vign_test/isotree/vignettes/An_Introduction_to_Isolation_Forests_files/figure-html/unnamed-chunk-5-1.png
768x576 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 87907 bytes
Input file size = 88105 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0
  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		IDAT size = 86722
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 86441
  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 = 5		IDAT size = 86441

Output IDAT size = 86441 bytes (1466 bytes decrease)
Output file size = 86519 bytes (1586 bytes = 1.80% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/isotree.Rcheck/vign_test/isotree/vignettes/An_Introduction_to_Isolation_Forests_files/figure-html/unnamed-chunk-7-1.png
960x1152 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 225267 bytes
Input file size = 225669 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0
  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		IDAT size = 222240
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 220537
  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 = 5		IDAT size = 220537

Output IDAT size = 220537 bytes (4730 bytes decrease)
Output file size = 220615 bytes (5054 bytes = 2.24% decrease)


Quitting from lines 462-526 [unnamed-chunk-11] (An_Introduction_to_Isolation_Forests.Rmd)
Error: processing vignette 'An_Introduction_to_Isolation_Forests.Rmd' failed with diagnostics:
there is no package called 'kableExtra'
--- failed re-building ‘An_Introduction_to_Isolation_Forests.Rmd’

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

Error: Vignette re-building failed.
Execution halted