Dif.Surv.Rec: no visible global function definition for ‘survfitr’
Dif.Surv.Rec: no visible global function definition for ‘pchisq’
Plot.Data.Events: no visible global function definition for ‘dev.new’
Plot.Data.Events: no visible global function definition for ‘par’
Plot.Data.Events: no visible global function definition for ‘plot’
Plot.Data.Events: no visible global function definition for ‘title’
Plot.Data.Events: no visible global function definition for ‘mtext’
Plot.Data.Events: no visible global function definition for ‘legend’
Plot.Data.Events: no visible global function definition for ‘segments’
Plot.Data.Events: no visible global function definition for ‘points’
Plot.Event.Rec: no visible global function definition for ‘survfitr’
Plot.Event.Rec: no visible global function definition for ‘plot’
Plot.Event.Rec: no visible global function definition for ‘title’
Plot.Event.Rec: no visible global function definition for ‘abline’
Plot.Event.Rec: no visible global function definition for ‘gray’
Plot.Event.Rec: no visible global function definition for ‘segments’
Plot.Event.Rec: no visible global function definition for ‘text’
Plot.Surv.Rec: no visible global function definition for ‘survfitr’
Plot.Surv.Rec: no visible global function definition for ‘q.search’
Plot.Surv.Rec: no visible global function definition for ‘dev.new’
Plot.Surv.Rec: no visible global function definition for ‘plot’
Plot.Surv.Rec: no visible global function definition for ‘lines’
Plot.Surv.Rec: no visible global function definition for ‘legend’
Print.Summary: no visible global function definition for ‘survfitr’
Undefined global functions or variables:
  abline dev.new gray legend lines mtext par pchisq plot points
  q.search segments survfitr text title
Consider adding
  importFrom("grDevices", "dev.new", "gray")
  importFrom("graphics", "abline", "legend", "lines", "mtext", "par",
             "plot", "points", "segments", "text", "title")
  importFrom("stats", "pchisq")
to your NAMESPACE file.