plot.skewhypFit: no visible global function definition for ‘par’
plot.skewhypFit: no visible global function definition for
  ‘dev.interactive’
plot.skewhypFit: no visible global function definition for ‘hist’
plot.skewhypFit: no visible global function definition for ‘curve’
plot.skewhypFit: no visible global function definition for ‘title’
ppskewhyp: no visible global function definition for ‘ppoints’
ppskewhyp: no visible global function definition for ‘plot’
ppskewhyp: no visible global function definition for ‘title’
ppskewhyp: no visible global function definition for ‘abline’
pskewhyp: no visible global function definition for ‘integrate’
qqskewhyp: no visible global function definition for ‘ppoints’
qqskewhyp: no visible global function definition for ‘qqplot’
qqskewhyp: no visible global function definition for ‘title’
qqskewhyp: no visible global function definition for ‘abline’
qskewhyp: no visible global function definition for ‘uniroot’
qskewhyp: no visible global function definition for ‘splinefun’
qskewhyp: multiple local function definitions for ‘zeroFn’ with
  different formal arguments
rskewhyp: no visible global function definition for ‘rgamma’
rskewhyp: no visible global function definition for ‘rnorm’
skewhypCalcRange: no visible global function definition for ‘uniroot’
skewhypCalcRange : upperProb: no visible global function definition for
  ‘integrate’
skewhypCalcRange : lowerProb: no visible global function definition for
  ‘integrate’
skewhypFit: no visible global function definition for ‘optim’
skewhypFit: no visible global function definition for ‘nlm’
skewhypFitStart: no visible global function definition for ‘na.omit’
skewhypFitStart: no visible global function definition for ‘hist’
skewhypFitStartLA: no visible global function definition for ‘hist’
skewhypFitStartLA: no visible global function definition for ‘quantile’
skewhypFitStartLA: no visible global function definition for ‘lm’
skewhypMode: no visible global function definition for ‘optim’
skewhypTailPlotLine: no visible global function definition for ‘lines’
Undefined global functions or variables:
  abline curve dev.interactive hist integrate lines lm na.omit nlm
  optim par plot ppoints qqplot quantile rgamma rnorm splinefun title
  uniroot
Consider adding
  importFrom("grDevices", "dev.interactive")
  importFrom("graphics", "abline", "curve", "hist", "lines", "par",
             "plot", "title")
  importFrom("stats", "integrate", "lm", "na.omit", "nlm", "optim",
             "ppoints", "qqplot", "quantile", "rgamma", "rnorm",
             "splinefun", "uniroot")
to your NAMESPACE file.