PLL.coxnet: no visible global function definition for ‘coef’
Plot.coef.glmnet: no visible global function definition for ‘par’
Plot.coef.glmnet: no visible global function definition for ‘plot’
Plot.coef.glmnet: no visible global function definition for ‘abline’
Plot.peperr.curves: no visible global function definition for ‘plot’
Plot.peperr.curves: no visible global function definition for ‘lines’
Plot.peperr.curves : <anonymous>: no visible global function definition
  for ‘quantile’
Plot.peperr.curves: no visible global function definition for ‘polygon’
Plot.peperr.curves: no visible global function definition for ‘legend’
Plot.peperr.curves: no visible global function definition for ‘par’
Plot.peperr.curves: no visible global function definition for ‘text’
aggregation.auc: no visible global function definition for ‘predict’
aggregation.brier: no visible global function definition for ‘predict’
aggregation.misclass: no visible global function definition for
  ‘predict’
basesurv: no visible global function definition for ‘approx’
coef.sum.intsearch: no visible global function definition for ‘coef’
epsgo: no visible global function definition for ‘pdf’
epsgo: no visible global function definition for ‘par’
epsgo: no visible global function definition for ‘plot’
epsgo: no visible global function definition for ‘abline’
epsgo: no visible global function definition for ‘text’
epsgo: no visible global function definition for ‘runif’
epsgo: no visible global function definition for ‘sd’
epsgo: no visible global function definition for ‘dev.off’
fit.glmnet: no visible global function definition for ‘predict’
glmnet.subset: no visible global function definition for ‘runif’
plot.stabpath: no visible global function definition for ‘nonzeroCoef’
plot.stabpath: no visible global function definition for ‘par’
plot.stabpath: no visible global function definition for ‘matplot’
plot.stabpath: no visible global function definition for ‘abline’
plot.sum.intsearch: no visible binding for global variable
  ‘gray.colors’
plot.sum.intsearch: no visible global function definition for ‘plot’
plot.sum.intsearch: no visible global function definition for ‘grid’
plot.sum.intsearch: no visible global function definition for ‘abline’
predictProb.coxnet: no visible global function definition for ‘predict’
predictProb.glmnet: no visible global function definition for ‘predict’
Undefined global functions or variables:
  abline approx coef dev.off gray.colors grid legend lines matplot
  nonzeroCoef par pdf plot polygon predict quantile runif sd text
Consider adding
  importFrom("grDevices", "dev.off", "gray.colors", "pdf")
  importFrom("graphics", "abline", "grid", "legend", "lines", "matplot",
             "par", "plot", "polygon", "text")
  importFrom("stats", "approx", "coef", "predict", "quantile", "runif",
             "sd")
to your NAMESPACE file.