EMupdate : logLik.scale: no visible global function definition for 'dt'
EMupdate : quadsol.logLik.scale: no visible global function definition
  for 'optim'
EMupdate : quadsol.logLik.scale: no visible global function definition
  for 'optimize'
EMupdate: no visible global function definition for 'dt'
EMupdate: no visible global function definition for 'optim'
EMupdate: no visible global function definition for 'nlminb'
NRupdate: no visible global function definition for 'optimize'
OsplinePen: no visible global function definition for 'integrate'
confint.hisemit: no visible global function definition for 'qt'
logistic.enp: no visible global function definition for 'median'
logistic.enp: no visible global function definition for 'nls'
logistic.enp: no visible global function definition for 'predict'
penLik.EMNewton: no visible global function definition for 'dt'
penLik.EMNewton: no visible global function definition for 'quantile'
penLik.EMNewton : nLogLik.pen: no visible global function definition
  for 'dt'
penLik.EMNewton : nLogLik.pen: no visible global function definition
  for 'as'
penLik.EMNewton : deriv.nLogLik.pen: no visible global function
  definition for 'dt'
penLik.EMNewton : deriv.nLogLik.pen: no visible global function
  definition for 'as'
penLik.EMNewton : hess.nLogLik.pen: no visible global function
  definition for 'dt'
penLik.EMNewton : hess.nLogLik.pen: no visible global function
  definition for 'as'
penLik.EMNewton : logLiktest: no visible global function definition for
  'dt'
penLik.EMNewton: no visible global function definition for 'lm'
penLik.EMNewton: no visible global function definition for 'var'
penLik.EMNewton: no visible global function definition for 'optim'
penLik.EMNewton: no visible global function definition for 'nlminb'
penLik.EMNewton: no visible global function definition for 'as'
plotHisemitResid: no visible global function definition for 'hist'
plotHisemitTuning: no visible binding for global variable 'lines'
plotHisemitTuning: no visible global function definition for 'par'
plotHisemitTuning: no visible global function definition for 'lines'
plotHisemitTuning: no visible global function definition for 'abline'
plotHisemitTuning: no visible global function definition for 'points'
plotHisemitTuning: no visible global function definition for 'axis'
plotHisemitTuning: no visible global function definition for 'mtext'
scaledTMix.null: no visible global function definition for 'dt'
scaledTMix.null : logLik: no visible global function definition for
  'dt'
scaledTMix.null : grad: no visible global function definition for 'dt'
scaledTMix.null: no visible global function definition for 'optim'
scaledTMix.null : hess.nLogLik.pen: no visible global function
  definition for 'dt'
scaledTMix.null: no visible global function definition for 'var'
scaledTMix.psat : logLik: no visible global function definition for
  'dt'
scaledTMix.psat: no visible global function definition for 'optimize'
scaledTMix.psat: no visible global function definition for 'dt'
scaledTMix.sat: no visible global function definition for 'dt'
tPoly.newton: no visible global function definition for 'dt'
tPoly.newton: no visible global function definition for 'poly'
tPoly.newton : nLogLik.pen: no visible global function definition for
  'dt'
tPoly.newton : nLogLik.pen: no visible global function definition for
  'as'
tPoly.newton : deriv.nLogLik.pen: no visible global function definition
  for 'dt'
tPoly.newton : hess.nLogLik.pen: no visible global function definition
  for 'dt'
tPoly.newton : hess.nLogLik.pen: no visible global function definition
  for 'as'
tPoly.newton : logLiktest: no visible global function definition for
  'dt'
tPoly.newton: no visible global function definition for 'nlminb'
tPoly.newton: no visible global function definition for 'var'
tPoly.newton: no visible global function definition for 'as'
Undefined global functions or variables:
  abline as axis dt hist integrate lines lm median mtext nlminb nls
  optim optimize par points poly predict qt quantile var
Consider adding
  importFrom("graphics", "abline", "axis", "hist", "lines", "mtext",
             "par", "points")
  importFrom("methods", "as")
  importFrom("stats", "dt", "integrate", "lm", "median", "nlminb", "nls",
             "optim", "optimize", "poly", "predict", "qt", "quantile",
             "var")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').