Eup.default: no visible global function definition for 'model.frame'
Eup.default: no visible global function definition for 'var'
Eup.inference: no visible global function definition for 'pnorm'
FUN.Eup: no visible global function definition for 'cor'
FUN.Eup: no visible global function definition for 'coef'
FUN.Eup: no visible global function definition for 'lm'
FUN.Pformula: no visible global function definition for 'model.frame'
FUN.Pformula: no visible global function definition for
  'model.response'
FUN.Pformula: no visible global function definition for 'model.matrix'
FUN.iterate.GCV: no visible global function definition for 'coef'
FUN.iterate.GCV: no visible global function definition for 'lm'
KSS.CV : Outer.CV : Inner.CV: no visible global function definition for
  'residuals'
KSS.CV : Outer.CV : Inner.CV: no visible global function definition for
  'lm'
KSS.CV: no visible global function definition for 'optimize'
KSS.default: no visible global function definition for 'model.frame'
KSS.dim.opt: no visible global function definition for 'qnorm'
KSS.dim.opt: no visible global function definition for 'pnorm'
abc.OptDim: no visible binding for global variable 'var'
abc.OptDim: no visible global function definition for 'median'
abc.OptDim: no visible global function definition for 'par'
abc.OptDim: no visible global function definition for 'plot'
abc.OptDim: no visible global function definition for 'abline'
abc.OptDim: no visible global function definition for 'points'
abc.OptDim: no visible global function definition for 'matplot'
checkSpecif: no visible global function definition for 'pchisq'
checkSpecif: no visible global function definition for 'qchisq'
coef.Eup: no visible binding for global variable 'var'
coef.Eup: no visible global function definition for 'var'
coef.KSS: no visible binding for global variable 'var'
coef.KSS: no visible global function definition for 'var'
coef.summary.Eup: no visible binding for global variable 'var'
coef.summary.Eup: no visible global function definition for 'var'
onatski.dim.opt: no visible global function definition for 'coef'
onatski.dim.opt: no visible global function definition for 'lm.fit'
plot.OptDim: no visible global function definition for 'rainbow'
plot.OptDim: no visible global function definition for 'barplot'
plot.OptDim: no visible global function definition for 'axis'
plot.OptDim: no visible global function definition for 'abline'
plot.OptDim: no visible global function definition for 'text'
plot.summary.Eup: no visible global function definition for 'coef'
plot.summary.Eup: no visible global function definition for 'par'
plot.summary.Eup: no visible global function definition for 'matplot'
plot.summary.Eup: no visible global function definition for 'plot.ts'
plot.summary.KSS: no visible global function definition for 'par'
plot.summary.KSS: no visible global function definition for 'matplot'
plot.summary.KSS: no visible global function definition for 'plot.ts'
print.summary.Eup: no visible global function definition for
  'printCoefmat'
print.summary.KSS: no visible global function definition for
  'printCoefmat'
standardize : <anonymous>: no visible global function definition for
  'var'
summary.Eup: no visible global function definition for 'var'
summary.KSS: no visible global function definition for 'coef'
summary.KSS: no visible global function definition for 'pnorm'
Undefined global functions or variables:
  abline axis barplot coef cor lm lm.fit matplot median model.frame
  model.matrix model.response optimize par pchisq plot plot.ts pnorm
  points printCoefmat qchisq qnorm rainbow residuals text var
Consider adding
  importFrom("grDevices", "rainbow")
  importFrom("graphics", "abline", "axis", "barplot", "matplot", "par",
             "plot", "points", "text")
  importFrom("stats", "coef", "cor", "lm", "lm.fit", "median",
             "model.frame", "model.matrix", "model.response", "optimize",
             "pchisq", "plot.ts", "pnorm", "printCoefmat", "qchisq",
             "qnorm", "residuals", "var")
to your NAMESPACE file.