anneal: no visible global function definition for 'layout'
anneal: no visible global function definition for 'runif'
anneal: no visible binding for global variable 'dbeta'
anneal: no visible binding for global variable 'dbinom'
anneal: no visible binding for global variable 'dcauchy'
anneal: no visible binding for global variable 'dchisq'
anneal: no visible binding for global variable 'dnorm'
anneal: no visible binding for global variable 'dexp'
anneal: no visible binding for global variable 'df'
anneal: no visible binding for global variable 'dgamma'
anneal: no visible binding for global variable 'dgeom'
anneal: no visible binding for global variable 'dhyper'
anneal: no visible binding for global variable 'dlnorm'
anneal: no visible binding for global variable 'dlogis'
anneal: no visible binding for global variable 'dnbinom'
anneal: no visible binding for global variable 'dpois'
anneal: no visible binding for global variable 'dt'
anneal: no visible binding for global variable 'dunif'
anneal: no visible binding for global variable 'dweibull'
anneal: no visible binding for global variable 'dwilcox'
likdisplay: no visible global function definition for 'dev.cur'
likdisplay: no visible global function definition for 'par'
likdisplay: no visible global function definition for 'text'
predicted_results: no visible binding for global variable 'pdf'
write_results: no visible binding for global variable 'var'
Undefined global functions or variables:
  dbeta dbinom dcauchy dchisq dev.cur dexp df dgamma dgeom dhyper
  dlnorm dlogis dnbinom dnorm dpois dt dunif dweibull dwilcox layout
  par pdf runif text var
Consider adding
  importFrom("grDevices", "dev.cur", "pdf")
  importFrom("graphics", "layout", "par", "text")
  importFrom("stats", "dbeta", "dbinom", "dcauchy", "dchisq", "dexp",
             "df", "dgamma", "dgeom", "dhyper", "dlnorm", "dlogis",
             "dnbinom", "dnorm", "dpois", "dt", "dunif", "dweibull",
             "dwilcox", "runif", "var")
to your NAMESPACE file.