ahaz: no visible global function definition for ‘predict’
ahaz.linterp: no visible global function definition for ‘approx’
ahazpen: no visible global function definition for ‘new’
coef.ahaz: no visible global function definition for ‘predict’
coef.ahazpen: no visible global function definition for ‘predict’
coef.tune.ahazpen: no visible global function definition for ‘predict’
error.bars: no visible global function definition for ‘segments’
plot.ahaz: no visible global function definition for ‘predict’
plot.ahazpen: no visible global function definition for ‘matplot’
plot.ahazpen: no visible global function definition for ‘axis’
plot.ahazpen: no visible global function definition for ‘mtext’
plot.cumahaz: no visible global function definition for ‘stepfun’
plot.tune.ahazpen: no visible global function definition for ‘abline’
plot.tune.ahazpen: no visible global function definition for ‘axis’
plot.tune.ahazpen: no visible global function definition for ‘mtext’
predict.tune.ahazpen: no visible global function definition for
  ‘predict’
print.ahaz: no visible global function definition for ‘coef’
print.summary.ahaz: no visible global function definition for
  ‘printCoefmat’
residuals.ahaz: no visible global function definition for ‘predict’
sscad.control : init.sol: no visible global function definition for
  ‘coef’
summary.ahaz: no visible global function definition for ‘pchisq’
summary.ahaz: no visible global function definition for ‘pnorm’
tune.ahazpen: no visible global function definition for ‘coef’
tune.ahazpen: no visible binding for global variable ‘sd’
Undefined global functions or variables:
  abline approx axis coef matplot mtext new pchisq pnorm predict
  printCoefmat sd segments stepfun
Consider adding
  importFrom("graphics", "abline", "axis", "matplot", "mtext",
             "segments")
  importFrom("methods", "new")
  importFrom("stats", "approx", "coef", "pchisq", "pnorm", "predict",
             "printCoefmat", "sd", "stepfun")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').