.addTags: no visible global function definition for ‘colors’
addNewPage: no visible global function definition for ‘dev.cur’
browseDataAsCSV: no visible global function definition for ‘write.csv’
browseDataAsCSV: no visible global function definition for ‘browseURL’
dev.copy2eps.hack: no visible global function definition for ‘dev.cur’
dev.copy2eps.hack: no visible binding for global variable ‘postscript’
dev.copy2eps.hack: no visible global function definition for ‘par’
dev.copy2eps.hack: no visible global function definition for ‘dev.off’
dev.copy2eps.hack: no visible global function definition for ‘dev.set’
devPrintHack: no visible binding for global variable ‘postscript’
devPrintHack: no visible global function definition for ‘dev.cur’
devPrintHack: no visible global function definition for ‘par’
devPrintHack: no visible global function definition for ‘ps.options’
devPrintHack: no visible global function definition for ‘dev.off’
devPrintHack: no visible global function definition for ‘dev.set’
evalChunk: no visible global function definition for
  ‘RweaveEvalWithOpt’
getRGtk2Version: no visible global function definition for
  ‘installed.packages’
printCurrentPage : <anonymous>: no visible global function definition
  for ‘dev.print’
replayAPlot : <anonymous>: no visible global function definition for
  ‘replayPlot’
.addhandlerchanged,gGraphicsRGtk-guiWidgetsToolkitRGtk2 : <anonymous>:
  no visible global function definition for ‘grconvertX’
.addhandlerchanged,gGraphicsRGtk-guiWidgetsToolkitRGtk2 : <anonymous>:
  no visible global function definition for ‘grconvertY’
.addhandlerclicked,gGraphicsRGtk-guiWidgetsToolkitRGtk2 : f: no visible
  global function definition for ‘grconvertX’
.addhandlerclicked,gGraphicsRGtk-guiWidgetsToolkitRGtk2 : f: no visible
  global function definition for ‘grconvertY’
.font<-,gTextRGtk-guiWidgetsToolkitRGtk2: no visible global function
  definition for ‘colors’
.gdf,guiWidgetsToolkitRGtk2: no visible binding for global variable
  ‘colors’
.ggraphics,guiWidgetsToolkitRGtk2 : .setDevNo: no visible global
  function definition for ‘dev.set’
.ggraphics,guiWidgetsToolkitRGtk2 : <anonymous>: no visible global
  function definition for ‘dev.off’
.ggraphicsnotebook,guiWidgetsToolkitRGtk2 : <anonymous>: no visible
  global function definition for ‘dev.list’
.ggraphicsnotebook,guiWidgetsToolkitRGtk2 : <anonymous>: no visible
  global function definition for ‘dev.set’
.leftBracket<-,gSpinbuttonRGtk-guiWidgetsToolkitRGtk2: no visible
  global function definition for ‘head’
.visible<-,gGraphicsRGtk-guiWidgetsToolkitRGtk2-ANY: no visible global
  function definition for ‘dev.set’
Undefined global functions or variables:
  RweaveEvalWithOpt browseURL colors dev.cur dev.list dev.off dev.print
  dev.set grconvertX grconvertY head installed.packages par postscript
  ps.options replayPlot write.csv
Consider adding
  importFrom("grDevices", "colors", "dev.cur", "dev.list", "dev.off",
             "dev.print", "dev.set", "postscript", "ps.options",
             "replayPlot")
  importFrom("graphics", "grconvertX", "grconvertY", "par")
  importFrom("utils", "RweaveEvalWithOpt", "browseURL", "head",
             "installed.packages", "write.csv")
to your NAMESPACE file.