SeSpPPVNPV: no visible global function definition for 'as.formula'
SeSpPPVNPV: no visible binding for global variable 'sd'
compare: no visible binding for global variable 'sd'
compare: no visible global function definition for 'pnorm'
compare: no visible global function definition for 'var'
compute_iid_decomposition_competing_risks: no visible global function
  definition for 'sd'
compute_iid_decomposition_survival: no visible global function
  definition for 'sd'
confint.ipcwcompetingrisksROC: no visible global function definition
  for 'qnorm'
confint.ipcwcompetingrisksROC: no visible global function definition
  for 'rnorm'
confint.ipcwcompetingrisksROC: no visible global function definition
  for 'quantile'
confint.ipcwsurvivalROC: no visible global function definition for
  'qnorm'
confint.ipcwsurvivalROC: no visible global function definition for
  'rnorm'
confint.ipcwsurvivalROC: no visible global function definition for
  'quantile'
plot.ipcwcompetingrisksROC: no visible global function definition for
  'plot'
plot.ipcwcompetingrisksROC: no visible global function definition for
  'lines'
plot.ipcwcompetingrisksROC: no visible global function definition for
  'abline'
plot.ipcwsurvivalROC: no visible global function definition for 'plot'
plot.ipcwsurvivalROC: no visible global function definition for 'lines'
plot.ipcwsurvivalROC: no visible global function definition for
  'abline'
plotAUCcurve: no visible global function definition for 'plot'
plotAUCcurve: no visible global function definition for 'abline'
plotAUCcurve: no visible global function definition for 'lines'
plotAUCcurve: no visible global function definition for 'confint'
plotAUCcurve: no visible global function definition for 'matlines'
plotAUCcurveDiff: no visible global function definition for 'plot'
plotAUCcurveDiff: no visible global function definition for 'abline'
plotAUCcurveDiff: no visible global function definition for 'lines'
plotAUCcurveDiff: no visible binding for global variable 'sd'
plotAUCcurveDiff: no visible global function definition for 'qnorm'
plotAUCcurveDiff: no visible global function definition for 'rnorm'
plotAUCcurveDiff: no visible global function definition for 'quantile'
print.ipcwcompetingrisksROC: no visible global function definition for
  'quantile'
print.ipcwcompetingrisksSeSpPPVNPV: no visible global function
  definition for 'quantile'
print.ipcwsurvivalROC: no visible global function definition for
  'quantile'
print.ipcwsurvivalSeSpPPVNPV: no visible global function definition for
  'quantile'
timeROC: no visible global function definition for 'as.formula'
Undefined global functions or variables:
  abline as.formula confint lines matlines plot pnorm qnorm quantile
  rnorm sd var
Consider adding
  importFrom("graphics", "abline", "lines", "matlines", "plot")
  importFrom("stats", "as.formula", "confint", "pnorm", "qnorm",
             "quantile", "rnorm", "sd", "var")
to your NAMESPACE file.