MergeGUI : mergefunc : undo: no visible global function definition for
  ‘gmessage’
MergeGUI : mergefunc : redo: no visible global function definition for
  ‘gmessage’
MergeGUI : mergefunc : VariableOptions: no visible global function
  definition for ‘gwindow’
MergeGUI : mergefunc : VariableOptions: no visible global function
  definition for ‘ggroup’
MergeGUI : mergefunc : VariableOptions: no visible global function
  definition for ‘glabel’
MergeGUI : mergefunc : VariableOptions: no visible global function
  definition for ‘gedit’
MergeGUI : mergefunc : VariableOptions: no visible global function
  definition for ‘gcombobox’
MergeGUI : mergefunc : VariableOptions: no visible global function
  definition for ‘gbutton’
MergeGUI : mergefunc : VariableOptions : <anonymous>: no visible global
  function definition for ‘gmessage’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘graphics.off’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘gmessage’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘sd’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘median’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘ggroup’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘glayout’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘glabel’
MergeGUI : mergefunc : smmry: no visible global function definition for
  ‘gtable’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘graphics.off’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘ggroup’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘glayout’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘gmessage’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘reorder’
MergeGUI : mergefunc : graph: no visible binding for global variable
  ‘median’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘ggraphics’
MergeGUI : mergefunc : graph: no visible global function definition for
  ‘ggpcp’
MergeGUI : mergefunc : dict: no visible global function definition for
  ‘graphics.off’
MergeGUI : mergefunc : dict: no visible global function definition for
  ‘ggroup’
MergeGUI : mergefunc : dict: no visible global function definition for
  ‘glayout’
MergeGUI : mergefunc : dict: no visible global function definition for
  ‘gtext’
MergeGUI : mergefunc : dict: no visible global function definition for
  ‘gmessage’
MergeGUI : mergefunc : dict: no visible global function definition for
  ‘capture.output’
MergeGUI : mergefunc : changetest: no visible global function
  definition for ‘gtable’
MergeGUI : mergefunc : changetest: no visible global function
  definition for ‘gmessage’
MergeGUI : mergefunc : changematching: no visible global function
  definition for ‘gmessage’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘gmessage’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘txtProgressBar’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘setTxtProgressBar’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘na.omit’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘sd’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘median’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘gfile’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘write.csv’
MergeGUI : mergefunc : watchdatafunc: no visible global function
  definition for ‘write.table’
MergeGUI : mergefunc: no visible global function definition for
  ‘read.csv’
MergeGUI : mergefunc: no visible global function definition for ‘combn’
MergeGUI : mergefunc: no visible global function definition for
  ‘gwindow’
MergeGUI : mergefunc: no visible global function definition for
  ‘gnotebook’
MergeGUI : mergefunc: no visible global function definition for
  ‘ggroup’
MergeGUI : mergefunc: no visible global function definition for
  ‘gframe’
MergeGUI : mergefunc: no visible global function definition for
  ‘gradio’
MergeGUI : mergefunc: no visible global function definition for
  ‘glabel’
MergeGUI : mergefunc: no visible global function definition for ‘gedit’
MergeGUI : mergefunc: no visible global function definition for
  ‘gcheckboxgroup’
MergeGUI : mergefunc: no visible global function definition for
  ‘gtable’
MergeGUI : mergefunc: no visible global function definition for
  ‘addHandlerKeystroke’
MergeGUI : mergefunc: no visible global function definition for
  ‘gbutton’
MergeGUI : mergeID : watchIDfunc: no visible global function definition
  for ‘gmessage’
MergeGUI : mergeID : watchIDfunc: no visible global function definition
  for ‘gfile’
MergeGUI : mergeID : watchIDfunc: no visible global function definition
  for ‘write.csv’
MergeGUI : mergeID: no visible global function definition for
  ‘read.csv’
MergeGUI : mergeID: no visible global function definition for ‘gwindow’
MergeGUI : mergeID: no visible global function definition for ‘ggroup’
MergeGUI : mergeID: no visible global function definition for ‘glabel’
MergeGUI : mergeID: no visible global function definition for
  ‘gcombobox’
MergeGUI : mergeID: no visible global function definition for ‘gbutton’
MergeGUI: no visible global function definition for ‘gwindow’
MergeGUI: no visible global function definition for ‘ggroup’
MergeGUI: no visible global function definition for ‘gtable’
MergeGUI: no visible global function definition for ‘gbutton’
MergeGUI : <anonymous>: no visible global function definition for
  ‘na.omit’
MergeGUI : <anonymous>: no visible global function definition for
  ‘gfile’
scale_kstest: no visible global function definition for ‘na.omit’
scale_kstest: no visible global function definition for ‘ks.test’
scale_missing: no visible global function definition for ‘na.omit’
scale_missing: no visible global function definition for ‘chisq.test’
scale_rpart: no visible global function definition for ‘na.omit’
scale_rpart: no visible global function definition for ‘weighted.mean’
scale_rpart: no visible global function definition for ‘residuals’
Undefined global functions or variables:
  addHandlerKeystroke capture.output chisq.test combn gbutton
  gcheckboxgroup gcombobox gedit gfile gframe ggpcp ggraphics ggroup
  glabel glayout gmessage gnotebook gradio graphics.off gtable gtext
  gwindow ks.test median na.omit read.csv reorder residuals sd
  setTxtProgressBar txtProgressBar weighted.mean write.csv write.table
Consider adding
  importFrom("grDevices", "graphics.off")
  importFrom("stats", "chisq.test", "ks.test", "median", "na.omit",
             "reorder", "residuals", "sd", "weighted.mean")
  importFrom("utils", "capture.output", "combn", "read.csv",
             "setTxtProgressBar", "txtProgressBar", "write.csv",
             "write.table")
to your NAMESPACE file.