'library' or 'require' calls in package code:
  'lars' 'randomForest' 'ridge' 'snowfall' 'tree'
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for 'lars'
COBRA : COBRA.lars: no visible global function definition for
  'predict.lars'
COBRA : COBRA.tree: no visible global function definition for 'tree'
COBRA : COBRA.tree: no visible global function definition for
  'as.formula'
COBRA : COBRA.tree: no visible global function definition for 'predict'
COBRA : COBRA.ridge: no visible global function definition for
  'linearRidge'
COBRA : COBRA.ridge: no visible global function definition for
  'as.formula'
COBRA : COBRA.ridge: no visible global function definition for
  'predict'
COBRA : COBRA.randomForest: no visible global function definition for
  'randomForest'
COBRA : COBRA.randomForest: no visible global function definition for
  'predict'
COBRA: no visible global function definition for 'sfInit'
COBRA: no visible global function definition for 'sfLibrary'
COBRA: no visible global function definition for 'sfExportAll'
COBRA: no visible global function definition for 'sfSapply'
COBRA: no visible global function definition for 'sfStop'
COBRA: no visible global function definition for 'write.table'
COBRA: no visible global function definition for 'pdf'
COBRA: no visible global function definition for 'points'
COBRA: no visible global function definition for 'legend'
COBRA: no visible global function definition for 'abline'
COBRA: no visible global function definition for 'lines'
COBRA: no visible global function definition for 'dev.off'
COBRA: no visible global function definition for 'dev.new'
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
‘library’ or ‘require’ calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
File ‘COBRA/libs/COBRA.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
'library' or 'require' calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
File ‘COBRA/libs/COBRA.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.
'library' or 'require' calls in package code:
  'lars' 'randomForest' 'ridge' 'snowfall' 'tree'
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for 'lars'
COBRA : COBRA.lars: no visible global function definition for
  'predict.lars'
COBRA : COBRA.tree: no visible global function definition for 'tree'
COBRA : COBRA.tree: no visible global function definition for
  'as.formula'
COBRA : COBRA.tree: no visible global function definition for 'predict'
COBRA : COBRA.ridge: no visible global function definition for
  'linearRidge'
COBRA : COBRA.ridge: no visible global function definition for
  'as.formula'
COBRA : COBRA.ridge: no visible global function definition for
  'predict'
COBRA : COBRA.randomForest: no visible global function definition for
  'randomForest'
COBRA : COBRA.randomForest: no visible global function definition for
  'predict'
COBRA: no visible global function definition for 'sfInit'
COBRA: no visible global function definition for 'sfLibrary'
COBRA: no visible global function definition for 'sfExportAll'
COBRA: no visible global function definition for 'sfSapply'
COBRA: no visible global function definition for 'sfStop'
COBRA: no visible global function definition for 'write.table'
COBRA: no visible global function definition for 'pdf'
COBRA: no visible global function definition for 'points'
COBRA: no visible global function definition for 'legend'
COBRA: no visible global function definition for 'abline'
COBRA: no visible global function definition for 'lines'
COBRA: no visible global function definition for 'dev.off'
COBRA: no visible global function definition for 'dev.new'
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
‘library’ or ‘require’ calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
‘library’ or ‘require’ calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  'lars' 'randomForest' 'ridge' 'snowfall' 'tree'
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for 'lars'
COBRA : COBRA.lars: no visible global function definition for
  'predict.lars'
COBRA : COBRA.tree: no visible global function definition for 'tree'
COBRA : COBRA.tree: no visible global function definition for
  'as.formula'
COBRA : COBRA.tree: no visible global function definition for 'predict'
COBRA : COBRA.ridge: no visible global function definition for
  'linearRidge'
COBRA : COBRA.ridge: no visible global function definition for
  'as.formula'
COBRA : COBRA.ridge: no visible global function definition for
  'predict'
COBRA : COBRA.randomForest: no visible global function definition for
  'randomForest'
COBRA : COBRA.randomForest: no visible global function definition for
  'predict'
COBRA: no visible global function definition for 'sfInit'
COBRA: no visible global function definition for 'sfLibrary'
COBRA: no visible global function definition for 'sfExportAll'
COBRA: no visible global function definition for 'sfSapply'
COBRA: no visible global function definition for 'sfStop'
COBRA: no visible global function definition for 'write.table'
COBRA: no visible global function definition for 'pdf'
COBRA: no visible global function definition for 'points'
COBRA: no visible global function definition for 'legend'
COBRA: no visible global function definition for 'abline'
COBRA: no visible global function definition for 'lines'
COBRA: no visible global function definition for 'dev.off'
COBRA: no visible global function definition for 'dev.new'
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  ‘lars’ ‘randomForest’ ‘ridge’ ‘snowfall’ ‘tree’
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for ‘lars’
COBRA : COBRA.lars: no visible global function definition for
  ‘predict.lars’
COBRA : COBRA.tree: no visible global function definition for ‘tree’
COBRA : COBRA.tree: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.tree: no visible global function definition for ‘predict’
COBRA : COBRA.ridge: no visible global function definition for
  ‘linearRidge’
COBRA : COBRA.ridge: no visible global function definition for
  ‘as.formula’
COBRA : COBRA.ridge: no visible global function definition for
  ‘predict’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘randomForest’
COBRA : COBRA.randomForest: no visible global function definition for
  ‘predict’
COBRA: no visible global function definition for ‘sfInit’
COBRA: no visible global function definition for ‘sfLibrary’
COBRA: no visible global function definition for ‘sfExportAll’
COBRA: no visible global function definition for ‘sfSapply’
COBRA: no visible global function definition for ‘sfStop’
COBRA: no visible global function definition for ‘write.table’
COBRA: no visible global function definition for ‘pdf’
COBRA: no visible global function definition for ‘points’
COBRA: no visible global function definition for ‘legend’
COBRA: no visible global function definition for ‘abline’
COBRA: no visible global function definition for ‘lines’
COBRA: no visible global function definition for ‘dev.off’
COBRA: no visible global function definition for ‘dev.new’
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.
'library' or 'require' calls in package code:
  'lars' 'randomForest' 'ridge' 'snowfall' 'tree'
  Please use :: or requireNamespace() instead.
  See section 'Suggested packages' in the 'Writing R Extensions' manual.
COBRA : COBRA.lars: no visible global function definition for 'lars'
COBRA : COBRA.lars: no visible global function definition for
  'predict.lars'
COBRA : COBRA.tree: no visible global function definition for 'tree'
COBRA : COBRA.tree: no visible global function definition for
  'as.formula'
COBRA : COBRA.tree: no visible global function definition for 'predict'
COBRA : COBRA.ridge: no visible global function definition for
  'linearRidge'
COBRA : COBRA.ridge: no visible global function definition for
  'as.formula'
COBRA : COBRA.ridge: no visible global function definition for
  'predict'
COBRA : COBRA.randomForest: no visible global function definition for
  'randomForest'
COBRA : COBRA.randomForest: no visible global function definition for
  'predict'
COBRA: no visible global function definition for 'sfInit'
COBRA: no visible global function definition for 'sfLibrary'
COBRA: no visible global function definition for 'sfExportAll'
COBRA: no visible global function definition for 'sfSapply'
COBRA: no visible global function definition for 'sfStop'
COBRA: no visible global function definition for 'write.table'
COBRA: no visible global function definition for 'pdf'
COBRA: no visible global function definition for 'points'
COBRA: no visible global function definition for 'legend'
COBRA: no visible global function definition for 'abline'
COBRA: no visible global function definition for 'lines'
COBRA: no visible global function definition for 'dev.off'
COBRA: no visible global function definition for 'dev.new'
Undefined global functions or variables:
  abline as.formula dev.new dev.off lars legend linearRidge lines pdf
  points predict predict.lars randomForest sfExportAll sfInit sfLibrary
  sfSapply sfStop tree write.table
Consider adding
  importFrom("grDevices", "dev.new", "dev.off", "pdf")
  importFrom("graphics", "abline", "legend", "lines", "points")
  importFrom("stats", "as.formula", "predict")
  importFrom("utils", "write.table")
to your NAMESPACE file.