prob: no visible global function definition for ‘pnorm’
prob: no visible global function definition for ‘dnorm’
prob: no visible global function definition for ‘plot’
prob : <anonymous>: no visible global function definition for ‘dnorm’
prob: no visible global function definition for ‘axis’
prob: no visible global function definition for ‘polygon’
prob: no visible global function definition for ‘legend’
prob: no visible global function definition for ‘jpeg’
prob: no visible global function definition for ‘dev.off’
pval: no visible global function definition for ‘qt’
pval: no visible global function definition for ‘pt’
pval : dl: no visible global function definition for ‘dt’
pval: no visible global function definition for ‘pnorm’
pval : dl: no visible global function definition for ‘dnorm’
pval: no visible global function definition for ‘plot’
pval: no visible global function definition for ‘polygon’
pval: no visible global function definition for ‘axis’
pval: no visible global function definition for ‘segments’
pval: no visible global function definition for ‘legend’
pval: no visible global function definition for ‘jpeg’
pval: no visible global function definition for ‘title’
pval: no visible global function definition for ‘dev.off’
pval: no visible global function definition for ‘qchisq’
pval: no visible global function definition for ‘pchisq’
pval : dl: no visible global function definition for ‘dchisq’
pval: no visible global function definition for ‘qf’
pval: no visible global function definition for ‘pf’
qqsim: no visible global function definition for ‘rnorm’
qqsim: no visible global function definition for ‘runif’
qqsim: no visible global function definition for ‘rchisq’
qqsim: no visible global function definition for ‘rt’
qqsim: no visible global function definition for ‘par’
qqsim: no visible global function definition for ‘qqnorm’
qqsim: no visible global function definition for ‘qqline’
qqsim: no visible global function definition for ‘hist’
qqsim: no visible global function definition for ‘mtext’
qqsim: no visible global function definition for ‘jpeg’
qqsim: no visible global function definition for ‘dev.off’
timeseressim: no visible global function definition for ‘rnorm’
timeseressim: no visible global function definition for ‘par’
timeseressim: no visible global function definition for ‘plot’
timeseressim: no visible global function definition for ‘mtext’
timeseressim: no visible global function definition for ‘jpeg’
timeseressim: no visible global function definition for ‘dev.off’
Undefined global functions or variables:
  axis dchisq dev.off dnorm dt hist jpeg legend mtext par pchisq pf
  plot pnorm polygon pt qchisq qf qqline qqnorm qt rchisq rnorm rt
  runif segments title
Consider adding
  importFrom("grDevices", "dev.off", "jpeg")
  importFrom("graphics", "axis", "hist", "legend", "mtext", "par",
             "plot", "polygon", "segments", "title")
  importFrom("stats", "dchisq", "dnorm", "dt", "pchisq", "pf", "pnorm",
             "pt", "qchisq", "qf", "qqline", "qqnorm", "qt", "rchisq",
             "rnorm", "rt", "runif")
to your NAMESPACE file.