Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  'model.matrix'
ivFixed.formula: no visible global function definition for
  'model.response'
summary.ivFixed: no visible global function definition for 'coef'
summary.ivFixed: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  'model.matrix'
ivFixed.formula: no visible global function definition for
  'model.response'
summary.ivFixed: no visible global function definition for 'coef'
summary.ivFixed: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  'model.matrix'
ivFixed.formula: no visible global function definition for
  'model.response'
summary.ivFixed: no visible global function definition for 'coef'
summary.ivFixed: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  ‘model.matrix’
ivFixed.formula: no visible global function definition for
  ‘model.response’
summary.ivFixed: no visible global function definition for ‘coef’
summary.ivFixed: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
ivFixed.formula: no visible global function definition for
  'model.matrix'
ivFixed.formula: no visible global function definition for
  'model.response'
summary.ivFixed: no visible global function definition for 'coef'
summary.ivFixed: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.matrix", "model.response", "pt")
to your NAMESPACE file.