p.discrete.adjust : <anonymous>: no visible global function definition
  for 'stepfun'
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for 'stepfun'
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for 'stepfun'
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for ‘stepfun’
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.
p.discrete.adjust : <anonymous>: no visible global function definition
  for 'stepfun'
Undefined global functions or variables:
  stepfun
Consider adding
  importFrom("stats", "stepfun")
to your NAMESPACE file.