Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for 'model.frame'
findFormulaIn: no visible global function definition for 'as.formula'
kFoldCV: no visible binding for global variable 'par'
predictResponseFromWeightedAverage: no visible global function
  definition for 'weighted.mean'
print.boostr: no visible global function definition for 'str'
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
  ...
--- re-building 'boostr_user_inputs.Rmd' using knitr
Quitting from lines 122-135 (boostr_user_inputs.Rmd) 
Error: processing vignette 'boostr_user_inputs.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'boostr_user_inputs.Rmd'

--- re-building 'brief_intro_to_booster.Rmd' using knitr
--- finished re-building 'brief_intro_to_booster.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
  ...
--- re-building ‘boostr_user_inputs.Rmd’ using knitr
Quitting from lines 122-135 (boostr_user_inputs.Rmd) 
Error: processing vignette ‘boostr_user_inputs.Rmd’ failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘boostr_user_inputs.Rmd’

--- re-building ‘brief_intro_to_booster.Rmd’ using knitr
--- finished re-building ‘brief_intro_to_booster.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
--- re-building ‘boostr_user_inputs.Rmd’ using knitr
Quitting from lines 122-135 (boostr_user_inputs.Rmd) 
Error: processing vignette 'boostr_user_inputs.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘boostr_user_inputs.Rmd’

--- re-building ‘brief_intro_to_booster.Rmd’ using knitr
--- finished re-building ‘brief_intro_to_booster.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
--- re-building ‘boostr_user_inputs.Rmd’ using knitr
Quitting from lines 122-135 (boostr_user_inputs.Rmd) 
Error: processing vignette 'boostr_user_inputs.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘boostr_user_inputs.Rmd’

--- re-building ‘brief_intro_to_booster.Rmd’ using knitr
--- finished re-building ‘brief_intro_to_booster.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for 'model.frame'
findFormulaIn: no visible global function definition for 'as.formula'
kFoldCV: no visible binding for global variable 'par'
predictResponseFromWeightedAverage: no visible global function
  definition for 'weighted.mean'
print.boostr: no visible global function definition for 'str'
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
--- re-building 'boostr_user_inputs.Rmd' using knitr
Quitting from lines 122-135 (boostr_user_inputs.Rmd) 
Error: processing vignette 'boostr_user_inputs.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'boostr_user_inputs.Rmd'

--- re-building 'brief_intro_to_booster.Rmd' using knitr
--- finished re-building 'brief_intro_to_booster.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for 'model.frame'
findFormulaIn: no visible global function definition for 'as.formula'
kFoldCV: no visible binding for global variable 'par'
predictResponseFromWeightedAverage: no visible global function
  definition for 'weighted.mean'
print.boostr: no visible global function definition for 'str'
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Error(s) in re-building vignettes:
--- re-building 'boostr_user_inputs.Rmd' using knitr
Quitting from lines 122-135 (boostr_user_inputs.Rmd) 
Error: processing vignette 'boostr_user_inputs.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building 'boostr_user_inputs.Rmd'

--- re-building 'brief_intro_to_booster.Rmd' using knitr
--- finished re-building 'brief_intro_to_booster.Rmd'

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

Error: Vignette re-building failed.
Execution halted
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for 'model.frame'
findFormulaIn: no visible global function definition for 'as.formula'
kFoldCV: no visible binding for global variable 'par'
predictResponseFromWeightedAverage: no visible global function
  definition for 'weighted.mean'
print.boostr: no visible global function definition for 'str'
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
'LazyData' is specified without a 'data' directory
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for ‘model.frame’
findFormulaIn: no visible global function definition for ‘as.formula’
kFoldCV: no visible binding for global variable ‘par’
predictResponseFromWeightedAverage: no visible global function
  definition for ‘weighted.mean’
print.boostr: no visible global function definition for ‘str’
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.
Malformed Title field: should not end in a period.
boostBackend: no visible global function definition for 'model.frame'
findFormulaIn: no visible global function definition for 'as.formula'
kFoldCV: no visible binding for global variable 'par'
predictResponseFromWeightedAverage: no visible global function
  definition for 'weighted.mean'
print.boostr: no visible global function definition for 'str'
Undefined global functions or variables:
  as.formula model.frame par str weighted.mean
Consider adding
  importFrom("graphics", "par")
  importFrom("stats", "as.formula", "model.frame", "weighted.mean")
  importFrom("utils", "str")
to your NAMESPACE file.