FFD_GUI : <anonymous>: no visible global function definition for 'help'
FFD_GUI: no visible global function definition for 'packageDescription'
buildMySurvey: no visible global function definition for 'read.csv2'
chooseColumnName: no visible global function definition for 'read.csv2'
computePValue: no visible global function definition for 'dhyper'
lls: no visible global function definition for 'object.size'
plotWidget : plotFunction: no visible global function definition for
  'par'
sampleFarms: no visible global function definition for 'write.csv2'
savePlot: no visible global function definition for 'jpeg'
savePlot: no visible global function definition for 'png'
savePlot: no visible global function definition for 'pdf'
savePlot: no visible global function definition for 'dev.off'
setRGParameters: no visible global function definition for 'read.csv2'
HTML,IndSampling: no visible global function definition for 'median'
HTML,IndSamplingSummary: no visible global function definition for
  'median'
HTML,IndSamplingSummary: no visible global function definition for
  'par'
HTML,LtdSampling: no visible global function definition for 'median'
HTML,LtdSamplingSummary: no visible global function definition for
  'median'
HTML,LtdSamplingSummary: no visible global function definition for
  'par'
plot,IndSamplingSummary: no visible global function definition for
  'par'
plot,IndSamplingSummary: no visible global function definition for
  'title'
plot,LtdSamplingSummary: no visible global function definition for
  'par'
plot,LtdSamplingSummary: no visible global function definition for
  'title'
show,IndSampling: no visible global function definition for
  'capture.output'
show,LtdSampling: no visible global function definition for
  'capture.output'
show,SurveyData: no visible global function definition for 'head'
summary,IndSampling: no visible global function definition for
  'capture.output'
summary,IndSamplingSummary: no visible global function definition for
  'capture.output'
summary,LtdSampling: no visible global function definition for
  'capture.output'
summary,LtdSamplingSummary: no visible global function definition for
  'capture.output'
summary,SurveyData: no visible global function definition for
  'capture.output'
summary,SurveyData: no visible global function definition for 'str'
Undefined global functions or variables:
  capture.output dev.off dhyper head help jpeg median object.size
  packageDescription par pdf png read.csv2 str title write.csv2
Consider adding
  importFrom("grDevices", "dev.off", "jpeg", "pdf", "png")
  importFrom("graphics", "par", "title")
  importFrom("stats", "dhyper", "median")
  importFrom("utils", "capture.output", "head", "help", "object.size",
             "packageDescription", "read.csv2", "str", "write.csv2")
to your NAMESPACE file.