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

--- re-building ‘baseline.Rmd’ using rmarkdown
--- finished re-building ‘baseline.Rmd’

--- re-building ‘clinical_trials.Rmd’ using rmarkdown
--- finished re-building ‘clinical_trials.Rmd’

--- re-building ‘col_counts.Rmd’ using rmarkdown
--- finished re-building ‘col_counts.Rmd’

--- re-building ‘custom_appearance.Rmd’ using rmarkdown
--- finished re-building ‘custom_appearance.Rmd’

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

Quitting from lines 390-392 [unnamed-chunk-11] (example_analysis_coxreg.Rmd)
Error: processing vignette 'example_analysis_coxreg.Rmd' failed with diagnostics:
Error in content (summary) function: there is no package called 'car'
	occured at path: root
--- failed re-building ‘example_analysis_coxreg.Rmd’

--- re-building ‘exploratory_analysis.Rmd’ using rmarkdown
--- finished re-building ‘exploratory_analysis.Rmd’

--- re-building ‘format_precedence.Rmd’ using rmarkdown
--- finished re-building ‘format_precedence.Rmd’

--- re-building ‘introspecting_tables.Rmd’ using rmarkdown
--- finished re-building ‘introspecting_tables.Rmd’

--- re-building ‘manual_table_construction.Rmd’ using rmarkdown
--- finished re-building ‘manual_table_construction.Rmd’

--- re-building ‘rtables.Rmd’ using rmarkdown
--- finished re-building ‘rtables.Rmd’

--- re-building ‘sorting_pruning.Rmd’ using rmarkdown
--- finished re-building ‘sorting_pruning.Rmd’

--- re-building ‘split_functions.Rmd’ using rmarkdown
--- finished re-building ‘split_functions.Rmd’

--- re-building ‘subsetting_tables.Rmd’ using rmarkdown
--- finished re-building ‘subsetting_tables.Rmd’

--- re-building ‘tabulation_concepts.Rmd’ using rmarkdown
--- finished re-building ‘tabulation_concepts.Rmd’

--- re-building ‘tabulation_dplyr.Rmd’ using rmarkdown
--- finished re-building ‘tabulation_dplyr.Rmd’

--- re-building ‘title_footer.Rmd’ using rmarkdown
--- finished re-building ‘title_footer.Rmd’

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

Error: Vignette re-building failed.
Execution halted