Error(s) in re-building vignettes:
  ...
--- re-building ‘sf1.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf1_files/figure-html/unnamed-chunk-10-1.png
576x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 44433 bytes
Input file size = 44571 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 37636
  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 = 37636

Output IDAT size = 37636 bytes (6797 bytes decrease)
Output file size = 37714 bytes (6857 bytes = 15.38% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf1_files/figure-html/unnamed-chunk-11-1.png
576x336 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 20614 bytes
Input file size = 20716 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 17636
  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 = 17636

Output IDAT size = 17636 bytes (2978 bytes decrease)
Output file size = 17714 bytes (3002 bytes = 14.49% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf1_files/figure-html/unnamed-chunk-20-1.png
576x432 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 15495 bytes
Input file size = 15585 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 13456
  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 = 13456

Output IDAT size = 13456 bytes (2039 bytes decrease)
Output file size = 13534 bytes (2051 bytes = 13.16% decrease)


Quitting from lines 466-467 [unnamed-chunk-26] (sf1.Rmd)
Error: processing vignette 'sf1.Rmd' failed with diagnostics:
package tibble not available: install first?
--- failed re-building ‘sf1.Rmd’

--- re-building ‘sf2.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf2_files/figure-html/unnamed-chunk-20-1.png
576x432 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 110258 bytes
Input file size = 110492 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 97613
  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 = 97613

Output IDAT size = 97613 bytes (12645 bytes decrease)
Output file size = 97691 bytes (12801 bytes = 11.59% decrease)

--- finished re-building ‘sf2.Rmd’

--- re-building ‘sf3.Rmd’ using rmarkdown

Quitting from lines 42-47 [unnamed-chunk-2] (sf3.Rmd)
Error: processing vignette 'sf3.Rmd' failed with diagnostics:
there is no package called 'dplyr'
--- failed re-building ‘sf3.Rmd’

--- re-building ‘sf4.Rmd’ using rmarkdown

Quitting from lines 36-38 [unnamed-chunk-3] (sf4.Rmd)
Error: processing vignette 'sf4.Rmd' failed with diagnostics:
there is no package called 'dplyr'
--- failed re-building ‘sf4.Rmd’

--- re-building ‘sf5.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-1-1.png
288x288 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5204 bytes
Input file size = 6059 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4744
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 4689
  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 = 4689

Output IDAT size = 4689 bytes (515 bytes decrease)
Output file size = 4767 bytes (1292 bytes = 21.32% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-2-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 23378 bytes
Input file size = 23480 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 20786
  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 = 20786

Output IDAT size = 20786 bytes (2592 bytes decrease)
Output file size = 20864 bytes (2616 bytes = 11.14% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-3-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 30922 bytes
Input file size = 31036 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 27240
  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 = 27240

Output IDAT size = 27240 bytes (3682 bytes decrease)
Output file size = 27318 bytes (3718 bytes = 11.98% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-4-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 18370 bytes
Input file size = 18472 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14706
  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 = 14706

Output IDAT size = 14706 bytes (3664 bytes decrease)
Output file size = 14784 bytes (3688 bytes = 19.97% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-5-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 21148 bytes
Input file size = 21250 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 17445
  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 = 17445

Output IDAT size = 17445 bytes (3703 bytes decrease)
Output file size = 17523 bytes (3727 bytes = 17.54% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-6-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 22470 bytes
Input file size = 22572 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 18590
  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 = 18590

Output IDAT size = 18590 bytes (3880 bytes decrease)
Output file size = 18668 bytes (3904 bytes = 17.30% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-7-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 17657 bytes
Input file size = 17759 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 14554
  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 = 14554

Output IDAT size = 14554 bytes (3103 bytes decrease)
Output file size = 14632 bytes (3127 bytes = 17.61% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-8-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 29904 bytes
Input file size = 30018 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 24373
  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 = 24373

Output IDAT size = 24373 bytes (5531 bytes decrease)
Output file size = 24451 bytes (5567 bytes = 18.55% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-9-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 16502 bytes
Input file size = 16604 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12629
  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 = 12629

Output IDAT size = 12629 bytes (3873 bytes decrease)
Output file size = 12707 bytes (3897 bytes = 23.47% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-10-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 23118 bytes
Input file size = 23220 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 18564
  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 = 18564

Output IDAT size = 18564 bytes (4554 bytes decrease)
Output file size = 18642 bytes (4578 bytes = 19.72% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-11-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 23179 bytes
Input file size = 23281 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 19109
  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 = 19109

Output IDAT size = 19109 bytes (4070 bytes decrease)
Output file size = 19187 bytes (4094 bytes = 17.59% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-12-1.png
288x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 8320 bytes
Input file size = 9190 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7747
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 7619
  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 = 7619

Output IDAT size = 7619 bytes (701 bytes decrease)
Output file size = 7697 bytes (1493 bytes = 16.25% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-13-1.png
288x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 6615 bytes
Input file size = 7473 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 6136
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 6069
  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 = 6069

Output IDAT size = 6069 bytes (546 bytes decrease)
Output file size = 6147 bytes (1326 bytes = 17.74% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-14-1.png
288x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 6555 bytes
Input file size = 7413 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 5938
  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 = 5938

Output IDAT size = 5938 bytes (617 bytes decrease)
Output file size = 6016 bytes (1397 bytes = 18.85% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-15-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 24976 bytes
Input file size = 25090 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 20075
  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 = 20075

Output IDAT size = 20075 bytes (4901 bytes decrease)
Output file size = 20153 bytes (4937 bytes = 19.68% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf5_files/figure-html/unnamed-chunk-16-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 25908 bytes
Input file size = 26022 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 20049
  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 = 20049

Output IDAT size = 20049 bytes (5859 bytes decrease)
Output file size = 20127 bytes (5895 bytes = 22.65% decrease)


Quitting from lines 163-165 [unnamed-chunk-18] (sf5.Rmd)
Error: processing vignette 'sf5.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘sf5.Rmd’

--- re-building ‘sf6.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf6_files/figure-html/unnamed-chunk-3-1.png
576x432 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 16643 bytes
Input file size = 17525 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 15584
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0		IDAT size = 15235
  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 = 3  f = 0		IDAT size = 15235

Output IDAT size = 15235 bytes (1408 bytes decrease)
Output file size = 15313 bytes (2212 bytes = 12.62% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/sf.Rcheck/vign_test/sf/vignettes/sf6_files/figure-html/unnamed-chunk-3-2.png
576x432 pixels, 8 bits/pixel, 253 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 9840 bytes
Input file size = 10701 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 8935
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 8902
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0		IDAT size = 8827
  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 = 3  f = 0		IDAT size = 8827

Output IDAT size = 8827 bytes (1013 bytes decrease)
Output file size = 8905 bytes (1796 bytes = 16.78% decrease)

--- finished re-building ‘sf6.Rmd’

--- re-building ‘sf7.Rmd’ using rmarkdown

Quitting from lines 143-148 [unnamed-chunk-5] (sf7.Rmd)
Error: processing vignette 'sf7.Rmd' failed with diagnostics:
package tibble not available: install first?
--- failed re-building ‘sf7.Rmd’

SUMMARY: processing the following files failed:
  ‘sf1.Rmd’ ‘sf3.Rmd’ ‘sf4.Rmd’ ‘sf5.Rmd’ ‘sf7.Rmd’

Error: Vignette re-building failed.
Execution halted