catch.exceptions.384: no visible global function definition for
  ‘read.delim’
catch.exceptions.384: no visible global function definition for
  ‘write.table’
catch.exceptions.96: no visible global function definition for
  ‘read.delim’
catch.exceptions.96: no visible global function definition for
  ‘write.table’
control.edit: no visible global function definition for ‘read.delim’
control.edit: no visible global function definition for ‘edit’
control.edit: no visible global function definition for ‘write.table’
defaultfiles.write: no visible global function definition for ‘data’
defaultfiles.write: no visible global function definition for
  ‘write.table’
dilution.edit: no visible global function definition for ‘read.delim’
dilution.edit: no visible global function definition for ‘edit’
dilution.edit: no visible global function definition for ‘write.table’
evaluation: no visible global function definition for ‘sd’
evaluation: no visible global function definition for ‘var’
evaluation: no visible global function definition for ‘qt’
evaluation: no visible global function definition for ‘pdf’
evaluation: no visible global function definition for ‘dev.off’
evaluation: no visible global function definition for ‘write.table’
fittedplot: no visible global function definition for ‘axis’
fittedplot: no visible global function definition for ‘lines’
hts.384: no visible global function definition for ‘pdf’
hts.384: no visible global function definition for ‘dev.off’
hts.384: no visible global function definition for ‘write.table’
hts.96: no visible global function definition for ‘pdf’
hts.96: no visible global function definition for ‘dev.off’
hts.96: no visible global function definition for ‘write.table’
ic50: no visible global function definition for ‘tktoplevel’
ic50: no visible global function definition for ‘tkwm.title’
ic50: no visible global function definition for ‘tkradiobutton’
ic50: no visible global function definition for ‘tclVar’
ic50: no visible global function definition for ‘tkconfigure’
ic50: no visible global function definition for ‘tkentry’
ic50 : onIndirBrowse: no visible global function definition for
  ‘tclvalue<-’
ic50 : onIndirBrowse: no visible global function definition for
  ‘tclvalue’
ic50 : onIndirBrowse: no visible global function definition for
  ‘tkchooseDirectory’
ic50: no visible global function definition for ‘tkbutton’
ic50 : onMeasureBrowse: no visible global function definition for
  ‘tclvalue<-’
ic50 : onMeasureBrowse: no visible global function definition for
  ‘tclvalue’
ic50 : onMeasureBrowse: no visible global function definition for
  ‘tkgetOpenFile’
ic50 : onControlBrowse: no visible global function definition for
  ‘tclvalue<-’
ic50 : onControlBrowse: no visible global function definition for
  ‘tclvalue’
ic50 : onControlBrowse: no visible global function definition for
  ‘tkgetOpenFile’
ic50 : onDilutionBrowse: no visible global function definition for
  ‘tclvalue<-’
ic50 : onDilutionBrowse: no visible global function definition for
  ‘tclvalue’
ic50 : onDilutionBrowse: no visible global function definition for
  ‘tkgetOpenFile’
ic50 : onOutdirBrowse: no visible global function definition for
  ‘tclvalue<-’
ic50 : onOutdirBrowse: no visible global function definition for
  ‘tclvalue’
ic50 : onOutdirBrowse: no visible global function definition for
  ‘tkchooseDirectory’
ic50 : onCompute: no visible global function definition for ‘tclvalue’
ic50 : onCompute: no visible global function definition for ‘tclVar’
ic50 : onCompute: no visible global function definition for ‘tkdestroy’
ic50 : <anonymous>: no visible global function definition for
  ‘tkdestroy’
ic50 : onMeasureEdit: no visible global function definition for
  ‘tclvalue’
ic50 : onControlEdit: no visible global function definition for
  ‘tclvalue’
ic50 : onDilutionEdit: no visible global function definition for
  ‘tclvalue’
ic50 : onInhibPerc: no visible global function definition for
  ‘tclvalue’
ic50 : onInhibPerc: no visible global function definition for
  ‘read.delim’
ic50 : onInhibPerc: no visible global function definition for ‘edit’
ic50: no visible global function definition for ‘tkgrid’
ic50: no visible global function definition for ‘tklabel’
ic50: no visible global function definition for ‘tkfocus’
ic50: no visible global function definition for ‘tkwait.window’
ic50.384: no visible global function definition for ‘read.delim’
ic50.96: no visible global function definition for ‘read.delim’
meanplot: no visible global function definition for ‘axis’
meanplot: no visible global function definition for ‘lines’
measure.edit: no visible global function definition for ‘read.delim’
measure.edit: no visible global function definition for ‘edit’
measure.edit: no visible global function definition for ‘write.table’
singleplot: no visible global function definition for ‘axis’
singleplot: no visible global function definition for ‘lines’
Undefined global functions or variables:
  axis data dev.off edit lines pdf qt read.delim sd tclVar tclvalue
  tclvalue<- tkbutton tkchooseDirectory tkconfigure tkdestroy tkentry
  tkfocus tkgetOpenFile tkgrid tklabel tkradiobutton tktoplevel
  tkwait.window tkwm.title var write.table
Consider adding
  importFrom("grDevices", "dev.off", "pdf")
  importFrom("graphics", "axis", "lines")
  importFrom("stats", "qt", "sd", "var")
  importFrom("utils", "data", "edit", "read.delim", "write.table")
to your NAMESPACE file.