CheckDataSet: no visible global function definition for 'na.omit'
NominalLogBiplotEM: no visible global function definition for 'plot'
NominalLogBiplotEM: no visible global function definition for 'text'
NominalLogBiplotEM: no visible global function definition for 'dev.new'
NominalLogisticBiplot: no visible global function definition for
  'model.frame'
RidgeMultinomialRegression: no visible global function definition for
  'pchisq'
plot.nominal.logistic.biplot: no visible global function definition for
  'colors'
plot.nominal.logistic.biplot: no visible global function definition for
  'dev.new'
plot.nominal.logistic.biplot: no visible global function definition for
  'plot'
plot.nominal.logistic.biplot: no visible global function definition for
  'text'
plot.nominal.logistic.biplot: no visible global function definition for
  'legend'
plot.nominal.logistic.biplot: no visible global function definition for
  'points'
plot.voronoiprob: no visible global function definition for 'points'
plot.voronoiprob: no visible global function definition for 'text'
plot.voronoiprob: no visible global function definition for 'segments'
plot2CategLine: no visible global function definition for 'abline'
plot2CategLine: no visible global function definition for 'points'
plot2CategLine: no visible global function definition for 'text'
plotNominalFittedVariable: no visible global function definition for
  'dev.new'
plotNominalFittedVariable: no visible global function definition for
  'plot'
plotNominalFittedVariable: no visible global function definition for
  'points'
plotNominalFittedVariable: no visible global function definition for
  'text'
plotNominalVariable: no visible global function definition for
  'dev.new'
plotNominalVariable: no visible global function definition for 'plot'
plotNominalVariable: no visible global function definition for 'points'
plotNominalVariable: no visible global function definition for 'text'
summary.nominal.logistic.biplot: no visible global function definition
  for 'pnorm'
textsmart: no visible global function definition for 'text'
Undefined global functions or variables:
  abline colors dev.new legend model.frame na.omit pchisq plot pnorm
  points segments text
Consider adding
  importFrom("grDevices", "colors", "dev.new")
  importFrom("graphics", "abline", "legend", "plot", "points",
             "segments", "text")
  importFrom("stats", "model.frame", "na.omit", "pchisq", "pnorm")
to your NAMESPACE file.