'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
  ...
--- re-building 'Introduction.Rmd' using rmarkdown
Quitting from lines 39-43 (Introduction.Rmd) 
Error: processing vignette 'Introduction.Rmd' failed with diagnostics:
HTTP error 404.
--- failed re-building 'Introduction.Rmd'

SUMMARY: processing the following file failed:
  'Introduction.Rmd'

Error: Vignette re-building failed.
Execution halted
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
  ...
--- re-building ‘Introduction.Rmd’ using rmarkdown
Quitting from lines 39-43 (Introduction.Rmd) 
Error: processing vignette ‘Introduction.Rmd’ failed with diagnostics:
HTTP error 404.
--- failed re-building ‘Introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Namespace in Imports field not imported from: ‘rstudioapi’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘rstudioapi’
  All declared Imports should be used.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
--- re-building ‘Introduction.Rmd’ using rmarkdown
Quitting from lines 39-43 (Introduction.Rmd) 
Error: processing vignette 'Introduction.Rmd' failed with diagnostics:
HTTP error 404.
--- failed re-building ‘Introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
--- re-building 'Introduction.Rmd' using rmarkdown
Quitting from lines 39-43 (Introduction.Rmd) 
Error: processing vignette 'Introduction.Rmd' failed with diagnostics:
HTTP error 404.
--- failed re-building 'Introduction.Rmd'

SUMMARY: processing the following file failed:
  'Introduction.Rmd'

Error: Vignette re-building failed.
Execution halted
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
  ...
--- re-building ‘Introduction.Rmd’ using rmarkdown
Quitting from lines 39-43 (Introduction.Rmd) 
Error: processing vignette ‘Introduction.Rmd’ failed with diagnostics:
HTTP error 404.
--- failed re-building ‘Introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
  ...
--- re-building ‘Introduction.Rmd’ using rmarkdown
Quitting from lines 39-43 (Introduction.Rmd) 
Error: processing vignette 'Introduction.Rmd' failed with diagnostics:
HTTP error 404.
--- failed re-building ‘Introduction.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Namespace in Imports field not imported from: ‘rstudioapi’
  All declared Imports should be used.
'LazyData' is specified without a 'data' directory
Namespace in Imports field not imported from: ‘rstudioapi’
  All declared Imports should be used.
'LazyData' is specified without a 'data' directory
'LazyData' is specified without a 'data' directory
Namespace in Imports field not imported from: ‘rstudioapi’
  All declared Imports should be used.