.getPath: no visible global function definition for 'predict'
ZIClass: no visible binding for global variable 'na.omit'
ZIClass: no visible global function definition for 'predict'
analyzeClass: no visible global function definition for 'plot'
calibrate : findmax: no visible global function definition for 'lowess'
calibrate: no visible global function definition for 'lm'
calibrate: no visible global function definition for 'anova'
calibrate: no visible global function definition for 'coef'
focusGraph: no visible global function definition for 'dev.list'
focusGraph: no visible global function definition for 'bringToTop'
focusR: no visible global function definition for 'bringToTop'
getTrain: no visible global function definition for 'na.omit'
makeClass : selectVars: no visible global function definition for
  'as.formula'
predict.ZIClass: no visible global function definition for 'predict'
processSampleAll: no visible global function definition for 'predict'
viewResults: no visible global function definition for 'par'
viewResults: no visible global function definition for 'plot'
viewResults: no visible global function definition for 'points'
viewResults: no visible global function definition for 'text'
zidbDrawVignette: no visible global function definition for 'dev.size'
zidbDrawVignette: no visible global function definition for 'par'
zidbDrawVignette: no visible global function definition for 'dev.cur'
zidbDrawVignette: no visible global function definition for
  'rasterImage'
zidbPlotNew: no visible global function definition for 'par'
zidbPlotNew: no visible global function definition for 'plot'
Undefined global functions or variables:
  anova as.formula bringToTop coef dev.cur dev.list dev.size lm lowess
  na.omit par plot points predict rasterImage text
Consider adding
  importFrom("grDevices", "bringToTop", "dev.cur", "dev.list",
             "dev.size")
  importFrom("graphics", "par", "plot", "points", "rasterImage", "text")
  importFrom("stats", "anova", "as.formula", "coef", "lm", "lowess",
             "na.omit", "predict")
to your NAMESPACE file.