Error(s) in re-building vignettes:
--- re-building ‘adding-sequences.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

Quitting from lines 55-57 [view_map] (adding-sequences.Rmd)
Error: processing vignette 'adding-sequences.Rmd' failed with diagnostics:
attempt to apply non-function
--- failed re-building ‘adding-sequences.Rmd’

--- re-building ‘assessing_map_uncertainty.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘assessing_map_uncertainty.Rmd’

--- re-building ‘comparing-maps.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

Quitting from lines 23-27 [unnamed-chunk-2] (comparing-maps.Rmd)
Error: processing vignette 'comparing-maps.Rmd' failed with diagnostics:
attempt to apply non-function
--- failed re-building ‘comparing-maps.Rmd’

--- re-building ‘customising-map-appearance.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘customising-map-appearance.Rmd’

--- re-building ‘making-a-map-from-scratch.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

Quitting from lines 94-95 [viewing_an_acmap] (making-a-map-from-scratch.Rmd)
Error: processing vignette 'making-a-map-from-scratch.Rmd' failed with diagnostics:
attempt to apply non-function
--- failed re-building ‘making-a-map-from-scratch.Rmd’

--- re-building ‘merging-maps.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
--- finished re-building ‘merging-maps.Rmd’

SUMMARY: processing the following files failed:
  ‘adding-sequences.Rmd’ ‘comparing-maps.Rmd’
  ‘making-a-map-from-scratch.Rmd’

Error: Vignette re-building failed.
Execution halted