BiplotDensity: no visible global function definition for ‘rainbow’
BiplotDensity: no visible global function definition for ‘heat.colors’
BiplotDensity: no visible global function definition for
  ‘terrain.colors’
BiplotDensity: no visible global function definition for ‘topo.colors’
BiplotDensity: no visible global function definition for ‘cm.colors’
BiplotDensity: no visible global function definition for ‘par’
BiplotDensity: no visible global function definition for ‘image’
BiplotDensity: no visible global function definition for ‘plot’
BiplotDensity: no visible global function definition for ‘points’
BiplotDensity: no visible global function definition for ‘box’
BiplotDensity: no visible global function definition for ‘contour’
BiplotDensity: no visible global function definition for ‘text’
CalculateFittingIndicatorsMirt: no visible global function definition
  for ‘pchisq’
CheckDataSet: no visible global function definition for ‘na.omit’
OrdinalLogisticBiplot: no visible global function definition for
  ‘model.frame’
PlotClusters: no visible global function definition for ‘palette’
PlotClusters: no visible global function definition for ‘rainbow’
PlotClusters: no visible global function definition for ‘quantile’
PlotClusters: no visible global function definition for ‘chull’
PlotClusters: no visible global function definition for ‘lines’
PlotClusters: no visible global function definition for ‘points’
PlotClusters: no visible global function definition for ‘text’
plot.ordBipVariable: no visible global function definition for ‘abline’
plot.ordBipVariable: no visible global function definition for ‘points’
plot.ordBipVariable: no visible global function definition for ‘text’
plot.ordinal.logistic.biplot: no visible global function definition for
  ‘colors’
plot.ordinal.logistic.biplot: no visible global function definition for
  ‘points’
plot.ordinal.logistic.biplot: no visible global function definition for
  ‘dev.new’
plot.ordinal.logistic.biplot: no visible global function definition for
  ‘plot’
plot.ordinal.logistic.biplot: no visible global function definition for
  ‘text’
plot.ordinal.logistic.biplot: no visible global function definition for
  ‘legend’
plotCurvesCategoriesVariable: no visible global function definition for
  ‘dev.new’
plotCurvesCategoriesVariable: no visible global function definition for
  ‘plot’
plotCurvesCategoriesVariable: no visible global function definition for
  ‘points’
plotOrdinalFittedVariable: no visible global function definition for
  ‘dev.new’
plotOrdinalFittedVariable: no visible global function definition for
  ‘plot’
plotOrdinalVariable: no visible global function definition for
  ‘dev.new’
plotOrdinalVariable: no visible global function definition for ‘plot’
pordlogist: no visible global function definition for ‘pchisq’
summary.pordlogist: no visible global function definition for ‘pnorm’
Undefined global functions or variables:
  abline box chull cm.colors colors contour dev.new heat.colors image
  legend lines model.frame na.omit palette par pchisq plot pnorm points
  quantile rainbow terrain.colors text topo.colors
Consider adding
  importFrom("grDevices", "chull", "cm.colors", "colors", "dev.new",
             "heat.colors", "palette", "rainbow", "terrain.colors",
             "topo.colors")
  importFrom("graphics", "abline", "box", "contour", "image", "legend",
             "lines", "par", "plot", "points", "text")
  importFrom("stats", "model.frame", "na.omit", "pchisq", "pnorm",
             "quantile")
to your NAMESPACE file.