Error(s) in re-building vignettes:
  ...
--- re-building ‘computeError.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cvwrapr.Rcheck/vign_test/cvwrapr/vignettes/computeError_files/figure-html/unnamed-chunk-3-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 28047 bytes
Input file size = 28161 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 20970
  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 = 20970

Output IDAT size = 20970 bytes (7077 bytes decrease)
Output file size = 21048 bytes (7113 bytes = 25.26% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cvwrapr.Rcheck/vign_test/cvwrapr/vignettes/computeError_files/figure-html/unnamed-chunk-5-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 25389 bytes
Input file size = 25503 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19254
  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 = 19254

Output IDAT size = 19254 bytes (6135 bytes decrease)
Output file size = 19332 bytes (6171 bytes = 24.20% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cvwrapr.Rcheck/vign_test/cvwrapr/vignettes/computeError_files/figure-html/unnamed-chunk-7-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 24220 bytes
Input file size = 24322 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 18554
  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 = 18554

Output IDAT size = 18554 bytes (5666 bytes decrease)
Output file size = 18632 bytes (5690 bytes = 23.39% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cvwrapr.Rcheck/vign_test/cvwrapr/vignettes/computeError_files/figure-html/unnamed-chunk-9-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 23476 bytes
Input file size = 23578 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 18563
  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 = 18563

Output IDAT size = 18563 bytes (4913 bytes decrease)
Output file size = 18641 bytes (4937 bytes = 20.94% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/cvwrapr.Rcheck/vign_test/cvwrapr/vignettes/computeError_files/figure-html/unnamed-chunk-10-1.png
672x480 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 24877 bytes
Input file size = 24991 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19047
  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 = 19047

Output IDAT size = 19047 bytes (5830 bytes decrease)
Output file size = 19125 bytes (5866 bytes = 23.47% decrease)

--- finished re-building ‘computeError.Rmd’

--- re-building ‘kfoldcv.Rmd’ using rmarkdown

Quitting from lines 59-63 [unnamed-chunk-6] (kfoldcv.Rmd)
Error: processing vignette 'kfoldcv.Rmd' failed with diagnostics:
there is no package called 'testthat'
--- failed re-building ‘kfoldcv.Rmd’

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

Error: Vignette re-building failed.
Execution halted