bichon_optim: no visible global function definition for 'pnorm'
bichon_optim: no visible global function definition for 'dnorm'
computeRealVolumeConstant: no visible global function definition for
  'pnorm'
integration_design: no visible global function definition for 'runif'
integration_design: no visible global function definition for 'pnorm'
max_infill_criterion: no visible global function definition for 'runif'
max_sur: no visible global function definition for 'pnorm'
max_sur: no visible global function definition for 'runif'
max_sur_parallel: no visible global function definition for 'pnorm'
max_sur_parallel: no visible global function definition for 'runif'
max_timse: no visible global function definition for 'runif'
max_timse_parallel: no visible global function definition for 'runif'
max_vorob_parallel: no visible global function definition for 'pnorm'
max_vorob_parallel: no visible global function definition for 'runif'
precomputeUpdateData: no visible global function definition for
  'model.matrix'
predict_nobias_km: no visible global function definition for
  'model.matrix'
predict_nobias_km: no visible global function definition for 'qnorm'
print_uncertainty_1d: no visible global function definition for 'pnorm'
print_uncertainty_1d: no visible global function definition for 'par'
print_uncertainty_1d: no visible global function definition for 'mtext'
print_uncertainty_1d: no visible global function definition for 'axis'
print_uncertainty_1d: no visible global function definition for
  'points'
print_uncertainty_1d: no visible global function definition for 'lines'
print_uncertainty_2d: no visible global function definition for 'pnorm'
print_uncertainty_2d: no visible global function definition for 'image'
print_uncertainty_2d: no visible global function definition for
  'grey.colors'
print_uncertainty_2d: no visible global function definition for 'mtext'
print_uncertainty_2d: no visible global function definition for 'axis'
print_uncertainty_2d: no visible global function definition for
  'contour'
print_uncertainty_2d: no visible global function definition for
  'points'
print_uncertainty_nd: no visible global function definition for 'par'
print_uncertainty_nd: no visible global function definition for
  'plot.new'
print_uncertainty_nd: no visible global function definition for 'pnorm'
print_uncertainty_nd: no visible global function definition for 'image'
print_uncertainty_nd: no visible global function definition for
  'grey.colors'
print_uncertainty_nd: no visible global function definition for 'mtext'
print_uncertainty_nd: no visible global function definition for
  'contour'
ranjan_optim: no visible global function definition for 'pnorm'
ranjan_optim: no visible global function definition for 'dnorm'
tsee_optim: no visible global function definition for 'dnorm'
tsee_optim: no visible global function definition for 'pnorm'
vorob_optim_parallel: no visible global function definition for 'qnorm'
vorob_optim_parallel: no visible global function definition for 'pnorm'
Undefined global functions or variables:
  axis contour dnorm grey.colors image lines model.matrix mtext par
  plot.new pnorm points qnorm runif
Consider adding
  importFrom("grDevices", "grey.colors")
  importFrom("graphics", "axis", "contour", "image", "lines", "mtext",
             "par", "plot.new", "points")
  importFrom("stats", "dnorm", "model.matrix", "pnorm", "qnorm", "runif")
to your NAMESPACE file.