Boot.FitFGN: no visible global function definition for ‘ts’
FitFGN: no visible global function definition for ‘tsp’
FitFGN: no visible global function definition for ‘var’
FitFGN: no visible global function definition for ‘acf’
FitFGN: no visible global function definition for ‘pchisq’
FitRegressionFGN: no visible global function definition for ‘lsfit’
FitRegressionFGN: no visible global function definition for ‘toeplitz’
GetFitFD: no visible global function definition for ‘spec.pgram’
GetFitFD: no visible global function definition for ‘optimize’
GetFitFD: no visible global function definition for ‘optim’
GetFitFD: no visible global function definition for ‘uniroot’
GetFitFD: no visible global function definition for ‘plot’
GetFitFD: no visible global function definition for ‘par’
GetFitFD: no visible global function definition for ‘text’
GetFitFD: no visible global function definition for ‘polygon’
GetFitFD: no visible global function definition for ‘lines’
GetFitFGN: no visible global function definition for ‘spec.pgram’
GetFitFGN: no visible global function definition for ‘optimize’
GetFitFGN: no visible global function definition for ‘optim’
GetFitFGN: no visible global function definition for ‘uniroot’
GetFitFGN: no visible global function definition for ‘plot’
GetFitFGN: no visible global function definition for ‘par’
GetFitFGN: no visible global function definition for ‘text’
GetFitFGN: no visible global function definition for ‘polygon’
GetFitFGN: no visible global function definition for ‘lines’
GetFitPLA: no visible global function definition for ‘spec.pgram’
GetFitPLA: no visible global function definition for ‘optimize’
GetFitPLA: no visible global function definition for ‘optim’
GetFitPLA: no visible global function definition for ‘uniroot’
GetFitPLA: no visible global function definition for ‘plot’
GetFitPLA: no visible global function definition for ‘par’
GetFitPLA: no visible global function definition for ‘text’
GetFitPLA: no visible global function definition for ‘polygon’
GetFitPLA: no visible global function definition for ‘lines’
GetFitPLS: no visible global function definition for ‘spec.pgram’
GetFitPLS: no visible global function definition for ‘optimize’
GetFitPLS: no visible global function definition for ‘optim’
GetFitPLS: no visible global function definition for ‘uniroot’
GetFitPLS: no visible global function definition for ‘plot’
GetFitPLS: no visible global function definition for ‘par’
GetFitPLS: no visible global function definition for ‘text’
GetFitPLS: no visible global function definition for ‘polygon’
GetFitPLS: no visible global function definition for ‘lines’
Reimann: no visible global function definition for ‘approx’
WLoglikelihood: no visible global function definition for ‘spec.pgram’
earfima: no visible global function definition for ‘optim’
mix: no visible global function definition for ‘fft’
mult: no visible global function definition for ‘convolve’
plot.FitFGN: no visible global function definition for ‘acf’
plot.FitFGN: no visible global function definition for ‘layout’
plot.FitFGN: no visible global function definition for ‘plot’
plot.FitFGN: no visible global function definition for ‘lines’
plot.FitFGN: no visible global function definition for ‘abline’
predict.FitFGN: no visible global function definition for ‘var’
tacvfARFIMA: no visible global function definition for ‘nextn’
tacvfFARMA: no visible global function definition for ‘nextn’
warfima: no visible global function definition for ‘spec.pgram’
warfima: no visible global function definition for ‘optim’
Undefined global functions or variables:
  abline acf approx convolve fft layout lines lsfit nextn optim
  optimize par pchisq plot polygon spec.pgram text toeplitz ts tsp
  uniroot var
Consider adding
  importFrom("graphics", "abline", "layout", "lines", "par", "plot",
             "polygon", "text")
  importFrom("stats", "acf", "approx", "convolve", "fft", "lsfit",
             "nextn", "optim", "optimize", "pchisq", "spec.pgram",
             "toeplitz", "ts", "tsp", "uniroot", "var")
to your NAMESPACE file.