dnl: no visible global function definition for 'dnorm'
millsR: no visible global function definition for 'pnorm'
millsR: no visible global function definition for 'dnorm'
nlFit: no visible global function definition for 'na.omit'
nlFit: no visible global function definition for 'optim'
nlFit: no visible global function definition for 'nlm'
nlFit: no visible global function definition for 'nlminb'
nlFitStart: no visible global function definition for 'hist'
nlFitStartMoM : diffVar: no visible global function definition for
  'var'
nlFitStartMoM: no visible global function definition for 'var'
nlFitStartMoM: no visible global function definition for 'optim'
plot.nlFit: no visible global function definition for 'par'
plot.nlFit: no visible global function definition for 'dev.interactive'
plot.nlFit: no visible global function definition for 'hist.default'
plot.nlFit: no visible global function definition for 'curve'
plot.nlFit: no visible global function definition for 'title'
pnl: no visible global function definition for 'dnorm'
pnl: no visible global function definition for 'pnorm'
ppnl: no visible global function definition for 'ppoints'
ppnl: no visible global function definition for 'plot'
ppnl: no visible global function definition for 'title'
ppnl: no visible global function definition for 'abline'
qnl: no visible global function definition for 'splinefun'
qnl: no visible global function definition for 'uniroot'
qqnl: no visible global function definition for 'ppoints'
qqnl: no visible global function definition for 'plot'
qqnl: no visible global function definition for 'title'
qqnl: no visible global function definition for 'abline'
rnl: no visible global function definition for 'rnorm'
Undefined global functions or variables:
  abline curve dev.interactive dnorm hist hist.default na.omit nlm
  nlminb optim par plot pnorm ppoints rnorm splinefun title uniroot var
Consider adding
  importFrom("grDevices", "dev.interactive")
  importFrom("graphics", "abline", "curve", "hist", "hist.default",
             "par", "plot", "title")
  importFrom("stats", "dnorm", "na.omit", "nlm", "nlminb", "optim",
             "pnorm", "ppoints", "rnorm", "splinefun", "uniroot", "var")
to your NAMESPACE file.