RValues: no visible global function definition for ‘cor.test’
commcorrelogram: no visible global function definition for ‘p.adjust’
lag.sort: no visible global function definition for ‘combn’
lagSelect: no visible global function definition for ‘dev.new’
lagSelect: no visible global function definition for ‘par’
mod.commcorrelogram: no visible global function definition for
  ‘na.omit’
mod.commcorrelogram: no visible global function definition for ‘nlminb’
mod.commcorrelogram: no visible global function definition for
  ‘uniroot’
mod.commcorrelogram: no visible global function definition for ‘par’
mod.commcorrelogram: no visible global function definition for ‘abline’
mod.commcorrelogram: no visible global function definition for ‘lines’
mod.commcorrelogram: no visible global function definition for ‘legend’
plot.commcorrelogram: no visible global function definition for
  ‘na.omit’
plot.commcorrelogram: no visible global function definition for ‘par’
plot.commcorrelogram: no visible global function definition for
  ‘abline’
plot.commcorrelogram: no visible global function definition for
  ‘legend’
mod,commcorrelogram: no visible global function definition for
  ‘na.omit’
mod,commcorrelogram: no visible global function definition for ‘nlminb’
mod,commcorrelogram: no visible global function definition for
  ‘uniroot’
mod,commcorrelogram: no visible global function definition for ‘par’
mod,commcorrelogram: no visible global function definition for ‘abline’
mod,commcorrelogram: no visible global function definition for ‘lines’
mod,commcorrelogram: no visible global function definition for ‘legend’
plot,commcorrelogram-missing: no visible global function definition for
  ‘na.omit’
plot,commcorrelogram-missing: no visible global function definition for
  ‘par’
plot,commcorrelogram-missing: no visible global function definition for
  ‘abline’
plot,commcorrelogram-missing: no visible global function definition for
  ‘legend’
Undefined global functions or variables:
  abline combn cor.test dev.new legend lines na.omit nlminb p.adjust
  par uniroot
Consider adding
  importFrom("grDevices", "dev.new")
  importFrom("graphics", "abline", "legend", "lines", "par")
  importFrom("stats", "cor.test", "na.omit", "nlminb", "p.adjust",
             "uniroot")
  importFrom("utils", "combn")
to your NAMESPACE file.