Error(s) in re-building vignettes:
  ...
--- re-building ‘data_preparation.Rmd’ using rmarkdown

Quitting from lines 24-32 [unnamed-chunk-2] (data_preparation.Rmd)
Error: processing vignette 'data_preparation.Rmd' failed with diagnostics:
there is no package called 'reshape2'
--- failed re-building ‘data_preparation.Rmd’

--- re-building ‘how-to.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/barplot-1.png
672x288 pixels, 8 bits/pixel, 256 colors in palette
Input IDAT size = 7823 bytes
Input file size = 8681 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 6939
  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 = 6939

Output IDAT size = 6939 bytes (884 bytes decrease)
Output file size = 7797 bytes (884 bytes = 10.18% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/steps1-1.png
672x288 pixels, 8 bits/pixel, 256 colors in palette
Input IDAT size = 8622 bytes
Input file size = 9492 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7734
  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 = 7734

Output IDAT size = 7734 bytes (888 bytes decrease)
Output file size = 8592 bytes (900 bytes = 9.48% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/steps2-1.png
672x288 pixels, 8 bits/pixel, 255 colors in palette
Input IDAT size = 8235 bytes
Input file size = 9102 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7384
  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 = 7384

Output IDAT size = 7384 bytes (851 bytes decrease)
Output file size = 8239 bytes (863 bytes = 9.48% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/density one-1.png
672x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 8745 bytes
Input file size = 9615 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7993
  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 = 7993

Output IDAT size = 7993 bytes (752 bytes decrease)
Output file size = 8071 bytes (1544 bytes = 16.06% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/ggplot-1.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 33464 bytes
Input file size = 33590 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27317
  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 = 27317

Output IDAT size = 27317 bytes (6147 bytes decrease)
Output file size = 27395 bytes (6195 bytes = 18.44% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/ggplot without weight-1.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 34132 bytes
Input file size = 34258 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27577
  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 = 27577

Output IDAT size = 27577 bytes (6555 bytes decrease)
Output file size = 27655 bytes (6603 bytes = 19.27% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/unnamed-chunk-3-1.png
672x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 11416 bytes
Input file size = 12286 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10657
  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 = 10657

Output IDAT size = 10657 bytes (759 bytes decrease)
Output file size = 10735 bytes (1551 bytes = 12.62% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/unnamed-chunk-3-2.png
672x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 11297 bytes
Input file size = 12167 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10530
  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 = 10530

Output IDAT size = 10530 bytes (767 bytes decrease)
Output file size = 10608 bytes (1559 bytes = 12.81% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/ggplot-combination-1.png
672x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 26681 bytes
Input file size = 26795 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19989
  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 = 19989

Output IDAT size = 19989 bytes (6692 bytes decrease)
Output file size = 20067 bytes (6728 bytes = 25.11% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/datplot.Rcheck/vign_test/datplot/vignettes/how-to_files/figure-html/cumulative demo-1.png
672x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 41925 bytes
Input file size = 42063 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 33809
  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 = 33809

Output IDAT size = 33809 bytes (8116 bytes decrease)
Output file size = 33887 bytes (8176 bytes = 19.44% decrease)

--- finished re-building ‘how-to.Rmd’

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

Error: Vignette re-building failed.
Execution halted