depratio: warning in match.call(expand = FALSE): partial argument match
  of ‘expand’ to ‘expand.dots’
drm: warning in match.call(expand = FALSE): partial argument match of
  ‘expand’ to ‘expand.dots’
depratio: no visible global function definition for ‘terms’
depratio: no visible global function definition for ‘model.extract’
depratio : <anonymous>: no visible global function definition for
  ‘quantile’
drm: no visible binding for global variable ‘binomial’
drm: no visible global function definition for ‘terms’
drm: no visible global function definition for ‘model.matrix’
drm: no visible global function definition for ‘model.extract’
drm: no visible global function definition for ‘glm.fit’
drm: no visible global function definition for ‘na.omit’
drm: no visible global function definition for ‘nlm’
getass.drm : <anonymous>: no visible global function definition for
  ‘model.matrix’
getass.drm : <anonymous>: no visible global function definition for
  ‘terms’
getass.drm : <anonymous>: no visible global function definition for
  ‘model.frame’
plot.depratio: no visible global function definition for ‘par’
plot.depratio : <anonymous>: no visible global function definition for
  ‘plot’
plot.depratio : <anonymous>: no visible global function definition for
  ‘segments’
plot.depratio : <anonymous>: no visible global function definition for
  ‘title’
plot.depratio : <anonymous>: no visible global function definition for
  ‘abline’
plot.depratio : <anonymous>: no visible global function definition for
  ‘axis’
plot.depratio: no visible global function definition for ‘matplot’
plot.depratio: no visible global function definition for ‘symbols’
plot.depratio: no visible global function definition for ‘axis’
plot.depratio: no visible global function definition for ‘abline’
Undefined global functions or variables:
  abline axis binomial glm.fit matplot model.extract model.frame
  model.matrix na.omit nlm par plot quantile segments symbols terms
  title
Consider adding
  importFrom("graphics", "abline", "axis", "matplot", "par", "plot",
             "segments", "symbols", "title")
  importFrom("stats", "binomial", "glm.fit", "model.extract",
             "model.frame", "model.matrix", "na.omit", "nlm", "quantile",
             "terms")
to your NAMESPACE file.