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

Quitting from lines 15-44 [unnamed-chunk-1] (clustered.Rmd)
Error: processing vignette 'clustered.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘clustered.Rmd’

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

Quitting from lines 15-43 [unnamed-chunk-1] (corelationmat.Rmd)
Error: processing vignette 'corelationmat.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘corelationmat.Rmd’

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

Quitting from lines 15-43 [unnamed-chunk-1] (correlated.Rmd)
Error: processing vignette 'correlated.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘correlated.Rmd’

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

Quitting from lines 15-46 [unnamed-chunk-1] (customdist.Rmd)
Error: processing vignette 'customdist.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘customdist.Rmd’

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

Quitting from lines 15-46 [unnamed-chunk-1] (double_dot_extension.Rmd)
Error: processing vignette 'double_dot_extension.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘double_dot_extension.Rmd’

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

Quitting from lines 15-23 [unnamed-chunk-1] (logisticCoefs.Rmd)
Error: processing vignette 'logisticCoefs.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘logisticCoefs.Rmd’

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

Quitting from lines 15-43 [unnamed-chunk-1] (longitudinal.Rmd)
Error: processing vignette 'longitudinal.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘longitudinal.Rmd’

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

Quitting from lines 15-70 [unnamed-chunk-1] (missing.Rmd)
Error: processing vignette 'missing.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘missing.Rmd’

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

Quitting from lines 15-46 [unnamed-chunk-1] (ordinal.Rmd)
Error: processing vignette 'ordinal.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘ordinal.Rmd’

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

Quitting from lines 15-45 [unnamed-chunk-1] (simstudy.Rmd)
Error: processing vignette 'simstudy.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘simstudy.Rmd’

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

Quitting from lines 15-44 [unnamed-chunk-1] (spline.Rmd)
Error: processing vignette 'spline.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘spline.Rmd’

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

Quitting from lines 129-138 [unnamed-chunk-6] (survival.Rmd)
Error: processing vignette 'survival.Rmd' failed with diagnostics:
there is no package called 'survminer'
--- failed re-building ‘survival.Rmd’

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

Quitting from lines 15-71 [unnamed-chunk-1] (treat_and_exposure.Rmd)
Error: processing vignette 'treat_and_exposure.Rmd' failed with diagnostics:
there is no package called 'ggplot2'
--- failed re-building ‘treat_and_exposure.Rmd’

SUMMARY: processing the following files failed:
  ‘clustered.Rmd’ ‘corelationmat.Rmd’ ‘correlated.Rmd’ ‘customdist.Rmd’
  ‘double_dot_extension.Rmd’ ‘logisticCoefs.Rmd’ ‘longitudinal.Rmd’
  ‘missing.Rmd’ ‘ordinal.Rmd’ ‘simstudy.Rmd’ ‘spline.Rmd’
  ‘survival.Rmd’ ‘treat_and_exposure.Rmd’

Error: Vignette re-building failed.
Execution halted