ITP1bspline: no visible global function definition for 'rbinom'
ITP1fourier : calcola_hotelling: no visible global function definition
  for 'cov'
ITP1fourier: no visible global function definition for 'fft'
ITP1fourier: no visible global function definition for 'rbinom'
ITP2bspline: no visible global function definition for 'rbinom'
ITP2fourier : calcola_hotelling_2pop: no visible global function
  definition for 'cov'
ITP2fourier: no visible global function definition for 'fft'
ITP2fourier: no visible global function definition for 'rbinom'
ITP2pafourier: no visible global function definition for 'fft'
ITP2pafourier: no visible global function definition for 'optimize'
ITP2pafourier: no visible global function definition for 'rbinom'
ITPaovbspline: no visible global function definition for
  'model.response'
ITPaovbspline: no visible global function definition for 'model.frame'
ITPaovbspline : stat_lm_glob: no visible global function definition for
  'summary.lm'
ITPaovbspline: no visible global function definition for 'model.matrix'
ITPaovbspline: no visible binding for global variable 'as.formula'
ITPaovbspline: no visible global function definition for 'aov'
ITPaovbspline: no visible global function definition for 'lm.fit'
ITPaovbspline: no visible binding for global variable 'lm'
ITPaovbspline: no visible global function definition for 'rbinom'
ITPimage: no visible global function definition for 'par'
ITPimage: no visible global function definition for 'rainbow'
ITPimage: no visible global function definition for 'layout'
ITPimage: no visible global function definition for 'image'
ITPimage: no visible global function definition for 'axis'
ITPimage: no visible global function definition for 'rect'
ITPimage: no visible global function definition for 'abline'
ITPimage: no visible global function definition for 'points'
ITPimage: no visible global function definition for 'lines'
ITPlmbspline: no visible global function definition for
  'model.response'
ITPlmbspline: no visible global function definition for 'model.frame'
ITPlmbspline: no visible global function definition for 'model.matrix'
ITPlmbspline: no visible global function definition for 'lm.fit'
ITPlmbspline: no visible binding for global variable 'as.formula'
ITPlmbspline: no visible binding for global variable 'lm'
ITPlmbspline: no visible global function definition for 'rbinom'
plot.ITP1: no visible global function definition for 'par'
plot.ITP1: no visible global function definition for 'lines'
plot.ITP1: no visible global function definition for 'rect'
plot.ITP1: no visible global function definition for 'abline'
plot.ITP1: no visible global function definition for 'points'
plot.ITP2: no visible global function definition for 'par'
plot.ITP2: no visible global function definition for 'rect'
plot.ITP2: no visible global function definition for 'abline'
plot.ITP2: no visible global function definition for 'points'
plot.ITPaov: no visible global function definition for 'par'
plot.ITPaov: no visible global function definition for 'rect'
plot.ITPaov: no visible global function definition for 'model.frame'
plot.ITPaov: no visible global function definition for 'matlines'
plot.ITPaov: no visible global function definition for 'abline'
plot.ITPaov: no visible global function definition for 'points'
plot.ITPlm: no visible global function definition for 'rainbow'
plot.ITPlm: no visible global function definition for 'par'
plot.ITPlm: no visible global function definition for 'rect'
plot.ITPlm: no visible global function definition for 'lines'
plot.ITPlm: no visible global function definition for 'abline'
plot.ITPlm: no visible global function definition for 'points'
Undefined global functions or variables:
  abline aov as.formula axis cov fft image layout lines lm lm.fit
  matlines model.frame model.matrix model.response optimize par points
  rainbow rbinom rect summary.lm
Consider adding
  importFrom("grDevices", "rainbow")
  importFrom("graphics", "abline", "axis", "image", "layout", "lines",
             "matlines", "par", "points", "rect")
  importFrom("stats", "aov", "as.formula", "cov", "fft", "lm", "lm.fit",
             "model.frame", "model.matrix", "model.response", "optimize",
             "rbinom", "summary.lm")
to your NAMESPACE file.