bands.add: no visible global function definition for ‘polygon’
bands.add: no visible global function definition for ‘lines’
bands.plot: no visible global function definition for ‘polygon’
bands.plot: no visible global function definition for ‘lines’
bands.plot: no visible global function definition for ‘abline’
esgcortest: no visible global function definition for ‘deltat’
esgcortest: no visible global function definition for ‘ts’
esgcortest : <anonymous>: no visible global function definition for
  ‘cor’
esgcortest : <anonymous>: no visible global function definition for
  ‘cor.test’
esgdiscountfactor: no visible global function definition for ‘start’
esgdiscountfactor: no visible global function definition for ‘deltat’
esgdiscountfactor: no visible global function definition for ‘ts’
esgdiscountfactor: no visible global function definition for ‘tsp’
esgdiscountfactor: no visible global function definition for ‘window’
esgfwdrates: no visible global function definition for ‘ts’
esgmartingaletest: no visible global function definition for ‘deltat’
esgmartingaletest: no visible global function definition for ‘ts’
esgmartingaletest: no visible binding for global variable ‘sd’
esgmartingaletest: no visible global function definition for ‘qt’
esgmartingaletest: no visible global function definition for ‘pt’
esgmartingaletest: no visible global function definition for ‘end’
esgmartingaletest: no visible global function definition for ‘start’
esgmccv: no visible global function definition for ‘is.ts’
esgmccv: no visible global function definition for ‘tsp’
esgmccv: no visible global function definition for ‘deltat’
esgmccv: no visible global function definition for ‘window’
esgmccv : <anonymous>: no visible global function definition for
  ‘t.test’
esgmccv: no visible global function definition for ‘matplot’
esgmccv: no visible global function definition for ‘polygon’
esgmccv: no visible global function definition for ‘lines’
esgmcprices: no visible global function definition for ‘is.ts’
esgmcprices: no visible global function definition for ‘tsp’
esgmcprices: no visible global function definition for ‘deltat’
esgmcprices: no visible global function definition for ‘ts’
esgmcprices: no visible global function definition for ‘start’
esgmcprices: no visible global function definition for ‘window’
esgplotbands: no visible global function definition for ‘is.ts’
esgplotbands : <anonymous>: no visible global function definition for
  ‘quantile’
esgplotbands : <anonymous>: no visible global function definition for
  ‘t.test’
esgplotbands: no visible global function definition for
  ‘colorRampPalette’
esgplotbands: no visible global function definition for ‘time’
esgplotbands: no visible global function definition for ‘points’
esgplotbands: no visible global function definition for ‘par’
esgplotbands: no visible global function definition for ‘lines’
esgplotshocks: no visible global function definition for ‘geom_point’
esgplotshocks: no visible global function definition for ‘aes’
esgplotshocks: no visible global function definition for ‘theme’
esgplotshocks: no visible global function definition for
  ‘element_blank’
esgplotshocks: no visible global function definition for
  ‘scale_color_manual’
esgplotshocks: no visible global function definition for ‘geom_density’
esgplotshocks: no visible global function definition for
  ‘scale_fill_manual’
esgplotshocks: no visible global function definition for ‘coord_flip’
esgplotts: no visible global function definition for ‘start’
esgplotts: no visible global function definition for ‘deltat’
esgplotts: no visible global function definition for ‘xlab’
esgplotts: no visible global function definition for ‘ylab’
esgplotts: no visible global function definition for ‘theme’
simdiff: no visible global function definition for ‘ts’
simshocks: no visible global function definition for ‘ts’
simshocks: no visible global function definition for ‘qnorm’
simshocks : <anonymous>: no visible global function definition for ‘ts’
Undefined global functions or variables:
  abline aes colorRampPalette coord_flip cor cor.test deltat
  element_blank end geom_density geom_point is.ts lines matplot par
  points polygon pt qnorm qt quantile scale_color_manual
  scale_fill_manual sd start t.test theme time ts tsp window xlab ylab
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "abline", "lines", "matplot", "par", "points",
             "polygon")
  importFrom("stats", "cor", "cor.test", "deltat", "end", "is.ts", "pt",
             "qnorm", "qt", "quantile", "sd", "start", "t.test", "time",
             "ts", "tsp", "window")
to your NAMESPACE file.