a.findcorrelations: no visible global function definition for 'cor'
a.iqr: no visible global function definition for 'quantile'
a.proportion.test: no visible global function definition for
  'fisher.test'
a.proportion.test: no visible global function definition for
  'chisq.test'
a.qr: no visible global function definition for 'quantile'
a.resetplotparams: no visible global function definition for 'par'
panel.bwstrip: no visible global function definition for 'quantile'
panel.bwstrip: no visible global function definition for
  'boxplot.stats'
panel.bwstrip: no visible global function definition for 'var'
panel.bwstrip: no visible global function definition for 'mad'
panel.bwstrip : do.plot: no visible global function definition for
  'runif'
panel.xy : panel.lminterval: no visible global function definition for
  'lm'
panel.xy : panel.lminterval: no visible global function definition for
  'coef'
panel.xy : panel.lminterval: no visible global function definition for
  'qt'
panel.xy: no visible global function definition for 'cor'
panel.xy: no visible global function definition for 'median'
panel.xy: no visible global function definition for 'var'
plotf : do.plot: no visible global function definition for 'dev.off'
plotf: no visible global function definition for 'dev.copy2eps'
plotf: no visible global function definition for 'postscript'
plotf: no visible global function definition for 'pdf'
plotf: no visible global function definition for 'png'
plotf: no visible global function definition for 'jpeg'
plotfit: no visible global function definition for 'par'
plotfit: no visible global function definition for 'plot'
Undefined global functions or variables:
  boxplot.stats chisq.test coef cor dev.copy2eps dev.off fisher.test
  jpeg lm mad median par pdf plot png postscript qt quantile runif var
Consider adding
  importFrom("grDevices", "boxplot.stats", "dev.copy2eps", "dev.off",
             "jpeg", "pdf", "png", "postscript")
  importFrom("graphics", "par", "plot")
  importFrom("stats", "chisq.test", "coef", "cor", "fisher.test", "lm",
             "mad", "median", "qt", "quantile", "runif", "var")
to your NAMESPACE file.