.echCusum1: no visible global function definition for 'xcusum.arl'
.echCusum2: no visible global function definition for 'xcusum.arl'
.echEwma1: no visible global function definition for 'xewma.arl'
.echEwma2: no visible global function definition for 'xewma.arl'
.echXbar1: no visible global function definition for 'pnorm'
.echXbar2: no visible global function definition for 'pnorm'
contour.edcc: no visible global function definition for 'par'
contour.edcc: no visible global function definition for 'title'
contour.edcc: no visible global function definition for 'mtext'
contour.edcc: no visible global function definition for 'points'
echCusum: no visible global function definition for 'xcusum.arl'
echEwma: no visible global function definition for 'xewma.arl'
echXbar: no visible global function definition for 'pnorm'
ecoCusum: no visible global function definition for 'optim'
ecoCusum: no visible global function definition for 'contour'
ecoCusum: no visible global function definition for 'mtext'
ecoCusum: no visible global function definition for 'points'
ecoCusum: no visible global function definition for 'xcusum.arl'
ecoEwma: no visible global function definition for 'optim'
ecoEwma: no visible global function definition for 'contour'
ecoEwma: no visible global function definition for 'points'
ecoEwma: no visible global function definition for 'mtext'
ecoEwma: no visible global function definition for 'title'
ecoEwma: no visible global function definition for 'xewma.arl'
ecoXbar: no visible global function definition for 'optim'
ecoXbar: no visible global function definition for 'contour'
ecoXbar: no visible global function definition for 'mtext'
ecoXbar: no visible global function definition for 'points'
ecoXbar: no visible global function definition for 'pnorm'
Undefined global functions or variables:
  contour mtext optim par pnorm points title xcusum.arl xewma.arl
Consider adding
  importFrom("graphics", "contour", "mtext", "par", "points", "title")
  importFrom("stats", "optim", "pnorm")
to your NAMESPACE file.