AER: no visible binding for global variable ‘survexp.fr’
AER: no visible global function definition for ‘na.omit’
AER: no visible global function definition for ‘survexp’
AER: no visible global function definition for ‘poisson’
AER: no visible global function definition for ‘glm’
AER: no visible global function definition for ‘qnorm’
LR: no visible binding for global variable ‘survexp.fr’
LR: no visible global function definition for ‘na.omit’
LR: no visible global function definition for ‘survexp’
LR: no visible global function definition for ‘pchisq’
SMR: no visible binding for global variable ‘survexp.fr’
SMR: no visible global function definition for ‘na.omit’
SMR: no visible global function definition for ‘survexp’
SMR: no visible global function definition for ‘qnorm’
SMR: no visible global function definition for ‘pchisq’
SMR: no visible global function definition for ‘glm’
SMR: no visible binding for global variable ‘poisson’
survexp_plot: no visible binding for global variable ‘survexp.fr’
survexp_plot: no visible global function definition for ‘na.omit’
survexp_plot: no visible global function definition for ‘par’
survexp_plot: no visible global function definition for ‘survfit’
survexp_plot: no visible global function definition for ‘plot’
survexp_plot: no visible global function definition for ‘survexp’
survexp_plot: no visible global function definition for ‘lines’
survexp_plot: no visible global function definition for ‘legend’
survexp_plot: no visible global function definition for ‘curve’
survexp_plot: no visible global function definition for ‘arrows’
survexp_plot: no visible global function definition for ‘points’
Undefined global functions or variables:
  arrows curve glm legend lines na.omit par pchisq plot points poisson
  qnorm survexp survexp.fr survfit
Consider adding
  importFrom("graphics", "arrows", "curve", "legend", "lines", "par",
             "plot", "points")
  importFrom("stats", "glm", "na.omit", "pchisq", "poisson", "qnorm")
to your NAMESPACE file.