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

Quitting from lines 164-177 [Metropolis_Hastings_2] (Optimizers.Rmd)
Error: processing vignette 'Optimizers.Rmd' failed with diagnostics:
The packages "dplyr", "tidyr", "tibble", and "ggplot2" are required to
use `plot.gips()` with `type %in% c('heatmap', 'MLE', 'block_heatmap')`;
without those packages, the `stats::heatmap()` will be used
--- failed re-building ‘Optimizers.Rmd’

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

Quitting from lines 70-71 [th1_2] (Theory.Rmd)
Error: processing vignette 'Theory.Rmd' failed with diagnostics:
The packages "dplyr", "tidyr", "tibble", and "ggplot2" are required to
use `plot.gips()` with `type %in% c('heatmap', 'MLE', 'block_heatmap')`;
without those packages, the `stats::heatmap()` will be used
--- failed re-building ‘Theory.Rmd’

--- re-building ‘gips.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/gips.Rcheck/vign_test/gips/vignettes/gips_files/figure-html/symvariant_matrix-1.png
288x288 pixels, 8 bits/pixel, 252 colors in palette
Input IDAT size = 2810 bytes
Input file size = 3656 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 2583
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 2523
  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 = 2523

Output IDAT size = 2523 bytes (287 bytes decrease)
Output file size = 3369 bytes (287 bytes = 7.85% decrease)


Quitting from lines 115-123 [change_D_matrix_example1_2] (gips.Rmd)
Error: processing vignette 'gips.Rmd' failed with diagnostics:
The packages "dplyr", "tidyr", "tibble", and "ggplot2" are required to
use `plot.gips()` with `type %in% c('heatmap', 'MLE', 'block_heatmap')`;
without those packages, the `stats::heatmap()` will be used
--- failed re-building ‘gips.Rmd’

SUMMARY: processing the following files failed:
  ‘Optimizers.Rmd’ ‘Theory.Rmd’ ‘gips.Rmd’

Error: Vignette re-building failed.
Execution halted