alonso.eqn12: no visible global function definition for ‘integrate’
display.untb: no visible global function definition for ‘rgb’
display.untb: no visible global function definition for ‘runif’
display.untb: no visible global function definition for ‘plot’
display.untb: no visible global function definition for ‘points’
fisher.ecosystem: no visible global function definition for ‘rpois’
fishers.alpha: no visible global function definition for ‘uniroot’
logkda.polyn: no visible global function definition for ‘coef’
optimal.params: no visible global function definition for ‘optim’
optimal.params.gst: no visible global function definition for
  ‘quantile’
optimal.params.sloss: no visible global function definition for
  ‘optimize’
optimal.params.sloss: no visible global function definition for
  ‘quantile’
optimal.theta: no visible global function definition for ‘optimize’
optimal.theta: no visible global function definition for ‘uniroot’
plot.census: no visible global function definition for ‘plot.default’
plot.census: no visible global function definition for ‘points’
plot.count: no visible global function definition for ‘plot.default’
plot.count: no visible global function definition for ‘points’
plot.preston: no visible global function definition for ‘barplot’
preston: no visible global function definition for ‘hist’
rand.neutral: no visible global function definition for ‘runif’
select.immigrate: no visible global function definition for ‘runif’
select.mutate: no visible global function definition for ‘runif’
vallade.eqn17: no visible global function definition for ‘integrate’
volkov : f: no visible global function definition for ‘integrate’
Undefined global functions or variables:
  barplot coef hist integrate optim optimize plot plot.default points
  quantile rgb rpois runif uniroot
Consider adding
  importFrom("grDevices", "rgb")
  importFrom("graphics", "barplot", "hist", "plot", "plot.default",
             "points")
  importFrom("stats", "coef", "integrate", "optim", "optimize",
             "quantile", "rpois", "runif", "uniroot")
to your NAMESPACE file.