quantile,cenmle-lognormal: warning in formatC(100 * q, format = "fg",
  wid = 1): partial argument match of 'wid' to 'width'
.mean.cenfit: no visible global function definition for 'qnorm'
cencen.Cen: no visible global function definition for 'as.formula'
cencen.vectors: no visible global function definition for 'as.formula'
cencen.vectors.groups: no visible global function definition for
  'as.formula'
cenpar.usr: no visible global function definition for 'par'
cenxyplot: no visible global function definition for 'points'
cenxyplot: no visible global function definition for 'segments'
hc.ppoints: no visible global function definition for 'ppoints'
ktau_p: no visible global function definition for 'pnorm'
new_cenreg_gaussian: no visible global function definition for
  'as.formula'
asSurv,formula: no visible global function definition for 'update'
boxplot,ros: no visible global function definition for 'bxp'
cendiff,numeric-logical-factor: no visible global function definition
  for 'as.formula'
cenfit,Cen-missing-missing: no visible global function definition for
  'as.formula'
cenfit,numeric-logical-factor: no visible global function definition
  for 'as.formula'
cenfit,numeric-logical-missing: no visible global function definition
  for 'as.formula'
cenmle,Cen-missing-missing: no visible global function definition for
  'as.formula'
cenmle,numeric-logical-factor: no visible global function definition
  for 'as.formula'
cenmle,numeric-logical-missing: no visible global function definition
  for 'as.formula'
cenmle,numeric-logical-numeric: no visible global function definition
  for 'as.formula'
cenreg,numeric-logical-factor: no visible global function definition
  for 'as.formula'
cenreg,numeric-logical-numeric: no visible global function definition
  for 'as.formula'
flip,formula: no visible global function definition for 'update'
lines,ros: no visible global function definition for 'qnorm'
mean,cenmle-gaussian: no visible global function definition for 'qnorm'
mean,cenmle-lognormal: no visible global function definition for
  'qnorm'
pexceed,ros: no visible global function definition for 'qnorm'
pexceed,ros: no visible global function definition for 'lm'
pexceed,ros: no visible global function definition for 'pnorm'
pexceed,ros: no visible global function definition for 'predict.lm'
plot,cenmle-gaussian-ANY: no visible global function definition for
  'qnorm'
plot,cenmle-lognormal-ANY: no visible global function definition for
  'qnorm'
plot,cenreg-ANY: no visible global function definition for 'qnorm'
plot,ros-missing: no visible global function definition for 'qnorm'
plot,ros-missing: no visible global function definition for 'axis'
plot,ros-missing: no visible global function definition for 'axTicks'
plot,ros-missing: no visible global function definition for 'mtext'
plot,ros-missing: no visible global function definition for 'points'
predict,cenreg-lognormal: no visible global function definition for
  'qnorm'
predict,ros: no visible global function definition for 'predict.lm'
quantile,cenmle-gaussian: no visible global function definition for
  'qnorm'
quantile,cenmle-gaussian: no visible global function definition for
  'qt'
quantile,cenmle-lognormal: no visible global function definition for
  'qnorm'
ros,numeric-logical: no visible global function definition for 'qnorm'
ros,numeric-logical: no visible global function definition for 'lm'
sd,ros: no visible global function definition for 'var'
show,summary.cenreg: no visible global function definition for 'pchisq'
show,summary.cenreg: no visible global function definition for
  'naprint'
summary,ros: no visible global function definition for 'summary.lm'
summary,ros: no visible global function definition for 'plot.lm'
Undefined global functions or variables:
  as.formula axTicks axis bxp lm mtext naprint par pchisq plot.lm pnorm
  points ppoints predict.lm qnorm qt segments summary.lm update var
Consider adding
  importFrom("graphics", "axTicks", "axis", "bxp", "mtext", "par",
             "points", "segments")
  importFrom("stats", "as.formula", "lm", "naprint", "pchisq", "pnorm",
             "ppoints", "predict.lm", "qnorm", "qt", "summary.lm",
             "update", "var")
to your NAMESPACE file.