DensityTestim : HO: no visible global function definition for 'matplot'
DensityTestim : HO: no visible global function definition for 'legend'
TBuildIrregularHisto: no visible global function definition for
  'quantile'
Tdistance : phi : phi.internal2: no visible global function definition
  for 'integrate'
Thisto: no visible global function definition for 'hist'
Tkernel: no visible global function definition for 'density'
Tkernel: no visible global function definition for 'approxfun'
Tparametric : f: no visible global function definition for 'dunif'
Tparametric: no visible global function definition for 'qunif'
Tparametric: no visible global function definition for 'sd'
Tparametric : f: no visible global function definition for 'dnorm'
Tparametric: no visible global function definition for 'qnorm'
Tparametric: no visible global function definition for 'var'
Tparametric : f: no visible global function definition for 'dlnorm'
Tparametric: no visible global function definition for 'qlnorm'
Tparametric : f: no visible global function definition for 'dexp'
Tparametric: no visible global function definition for 'qexp'
Tparametric : f: no visible global function definition for 'dgamma'
Tparametric: no visible global function definition for 'qgamma'
Tparametric : f: no visible global function definition for 'dchisq'
Tparametric: no visible global function definition for 'qchisq'
Tparametric : f: no visible global function definition for 'dbeta'
Tparametric: no visible global function definition for 'qbeta'
Undefined global functions or variables:
  approxfun dbeta dchisq density dexp dgamma dlnorm dnorm dunif hist
  integrate legend matplot qbeta qchisq qexp qgamma qlnorm qnorm
  quantile qunif sd var
Consider adding
  importFrom("graphics", "hist", "legend", "matplot")
  importFrom("stats", "approxfun", "dbeta", "dchisq", "density", "dexp",
             "dgamma", "dlnorm", "dnorm", "dunif", "integrate", "qbeta",
             "qchisq", "qexp", "qgamma", "qlnorm", "qnorm", "quantile",
             "qunif", "sd", "var")
to your NAMESPACE file.