bgbb.EstimateParameters: no visible global function definition for
  'optim'
bgbb.HeatmapHoldoutExpectedTrans: no visible global function definition
  for 'heatmap'
bgbb.HeatmapHoldoutExpectedTrans: no visible global function definition
  for 'gray'
bgbb.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'dbeta'
bgbb.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'plot'
bgbb.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'mtext'
bgbb.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'plot'
bgbb.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'lines'
bgbb.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'axis'
bgbb.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'legend'
bgbb.PlotFrequencyInCalibration: no visible global function definition
  for 'barplot'
bgbb.PlotFrequencyInCalibration: no visible global function definition
  for 'legend'
bgbb.PlotFrequencyInHoldout: no visible global function definition for
  'barplot'
bgbb.PlotFrequencyInHoldout: no visible global function definition for
  'legend'
bgbb.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'plot'
bgbb.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'lines'
bgbb.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'axis'
bgbb.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'legend'
bgbb.PlotTrackingCum: no visible global function definition for 'plot'
bgbb.PlotTrackingCum: no visible global function definition for 'lines'
bgbb.PlotTrackingCum: no visible global function definition for 'axis'
bgbb.PlotTrackingCum: no visible global function definition for
  'abline'
bgbb.PlotTrackingCum: no visible global function definition for
  'legend'
bgbb.PlotTrackingInc: no visible global function definition for 'plot'
bgbb.PlotTrackingInc: no visible global function definition for 'lines'
bgbb.PlotTrackingInc: no visible global function definition for 'axis'
bgbb.PlotTrackingInc: no visible global function definition for
  'abline'
bgbb.PlotTrackingInc: no visible global function definition for
  'legend'
bgbb.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'dbeta'
bgbb.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'plot'
bgbb.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'mtext'
bgnbd.EstimateParameters: no visible global function definition for
  'optim'
bgnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'qbeta'
bgnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'dbeta'
bgnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'plot'
bgnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'mtext'
bgnbd.PlotFreqVsConditionalExpectedFrequency: no visible global
  function definition for 'plot'
bgnbd.PlotFreqVsConditionalExpectedFrequency: no visible global
  function definition for 'lines'
bgnbd.PlotFreqVsConditionalExpectedFrequency: no visible global
  function definition for 'axis'
bgnbd.PlotFreqVsConditionalExpectedFrequency: no visible global
  function definition for 'legend'
bgnbd.PlotFrequencyInCalibration: no visible global function definition
  for 'barplot'
bgnbd.PlotFrequencyInCalibration: no visible global function definition
  for 'legend'
bgnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'plot'
bgnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'lines'
bgnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'axis'
bgnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'legend'
bgnbd.PlotTrackingCum: no visible global function definition for 'plot'
bgnbd.PlotTrackingCum: no visible global function definition for
  'lines'
bgnbd.PlotTrackingCum: no visible global function definition for 'axis'
bgnbd.PlotTrackingCum: no visible global function definition for
  'abline'
bgnbd.PlotTrackingCum: no visible global function definition for
  'legend'
bgnbd.PlotTrackingInc: no visible global function definition for 'plot'
bgnbd.PlotTrackingInc: no visible global function definition for
  'lines'
bgnbd.PlotTrackingInc: no visible global function definition for 'axis'
bgnbd.PlotTrackingInc: no visible global function definition for
  'abline'
bgnbd.PlotTrackingInc: no visible global function definition for
  'legend'
bgnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'qgamma'
bgnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'dgamma'
bgnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'plot'
bgnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'mtext'
bgnbd.compress.cbs: no visible global function definition for
  'aggregate'
dc.CreateFreqCBT: no visible global function definition for 'xtabs'
dc.CreateReachCBT: no visible global function definition for 'xtabs'
dc.CreateSpendCBT: no visible global function definition for 'xtabs'
dc.MergeTransactionsOnSameDate: no visible global function definition
  for 'aggregate'
dc.PlotLogLikelihoodContour: no visible global function definition for
  'dev.new'
dc.PlotLogLikelihoodContour: no visible global function definition for
  'contour'
dc.PlotLogLikelihoodContour: no visible global function definition for
  'abline'
dc.PlotLogLikelihoodContour: no visible global function definition for
  'title'
dc.PlotLogLikelihoodContours: no visible global function definition for
  'combn'
dc.PlotLogLikelihoodContours: no visible global function definition for
  'dev.new'
dc.PlotLogLikelihoodContours: no visible global function definition for
  'par'
dc.WriteLine: no visible global function definition for 'flush.console'
pnbd.EstimateParameters: no visible global function definition for
  'optim'
pnbd.Plot.DERT: no visible global function definition for 'contour'
pnbd.Plot.DERT: no visible global function definition for 'persp'
pnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'qgamma'
pnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'dgamma'
pnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'plot'
pnbd.PlotDropoutRateHeterogeneity: no visible global function
  definition for 'mtext'
pnbd.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'plot'
pnbd.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'lines'
pnbd.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'axis'
pnbd.PlotFreqVsConditionalExpectedFrequency: no visible global function
  definition for 'legend'
pnbd.PlotFrequencyInCalibration: no visible global function definition
  for 'barplot'
pnbd.PlotFrequencyInCalibration: no visible global function definition
  for 'legend'
pnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'plot'
pnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'lines'
pnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'axis'
pnbd.PlotRecVsConditionalExpectedFrequency: no visible global function
  definition for 'legend'
pnbd.PlotTrackingCum: no visible global function definition for 'plot'
pnbd.PlotTrackingCum: no visible global function definition for 'lines'
pnbd.PlotTrackingCum: no visible global function definition for 'axis'
pnbd.PlotTrackingCum: no visible global function definition for
  'abline'
pnbd.PlotTrackingCum: no visible global function definition for
  'legend'
pnbd.PlotTrackingInc: no visible global function definition for 'plot'
pnbd.PlotTrackingInc: no visible global function definition for 'lines'
pnbd.PlotTrackingInc: no visible global function definition for 'axis'
pnbd.PlotTrackingInc: no visible global function definition for
  'abline'
pnbd.PlotTrackingInc: no visible global function definition for
  'legend'
pnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'qgamma'
pnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'dgamma'
pnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'plot'
pnbd.PlotTransactionRateHeterogeneity: no visible global function
  definition for 'mtext'
pnbd.compress.cbs: no visible global function definition for
  'aggregate'
spend.EstimateParameters: no visible global function definition for
  'optim'
spend.plot.average.transaction.value: no visible global function
  definition for 'plot'
spend.plot.average.transaction.value: no visible global function
  definition for 'lines'
spend.plot.average.transaction.value: no visible global function
  definition for 'density'
spend.plot.average.transaction.value: no visible global function
  definition for 'smooth.spline'
spend.plot.average.transaction.value: no visible global function
  definition for 'legend'
Undefined global functions or variables:
  abline aggregate axis barplot combn contour dbeta density dev.new
  dgamma flush.console gray heatmap legend lines mtext optim par persp
  plot qbeta qgamma smooth.spline title xtabs
Consider adding
  importFrom("grDevices", "dev.new", "gray")
  importFrom("graphics", "abline", "axis", "barplot", "contour",
             "legend", "lines", "mtext", "par", "persp", "plot", "title")
  importFrom("stats", "aggregate", "dbeta", "density", "dgamma",
             "heatmap", "optim", "qbeta", "qgamma", "smooth.spline",
             "xtabs")
  importFrom("utils", "combn", "flush.console")
to your NAMESPACE file.