PlotCosts: no visible global function definition for 'lines'
PlotCosts: no visible global function definition for 'plot'
PlotEpi: no visible global function definition for 'rgb'
PlotEpi: no visible global function definition for 'lines'
PlotEpi: no visible global function definition for 'plot'
PlotEpi: no visible global function definition for 'legend'
PlotParams: no visible global function definition for 'par'
PlotParams: no visible global function definition for 'density'
PlotParams: no visible global function definition for 'rgamma'
PlotParams: no visible global function definition for 'rbeta'
PlotParams: no visible global function definition for 'plot'
PlotParams: no visible global function definition for 'quantile'
PlotParams: no visible global function definition for 'polygon'
PlotParams: no visible global function definition for 'rgb'
PlotParams: no visible global function definition for 'lines'
PlotParams: no visible global function definition for 'points'
SimulateEpidemicQuantiles: no visible binding for global variable
  'quantile'
SimulateEpidemicQuantiles: no visible binding for global variable
  'median'
SimulateManagementQuantiles: no visible binding for global variable
  'quantile'
SimulateManagementQuantiles: no visible binding for global variable
  'median'
TimeSeriesOfDensities: no visible global function definition for
  'density'
TimeSeriesOfDensities: no visible global function definition for 'plot'
TimeSeriesOfDensities: no visible global function definition for
  'lines'
TimeSeriesOfDensities: no visible global function definition for 'rgb'
TimeSeriesOfDensities: no visible global function definition for 'axis'
TimeSeriesOfDensities: no visible global function definition for 'box'
epi.gibbs.mu: no visible global function definition for 'rbeta'
epi.gibbs.nu: no visible global function definition for 'rbeta'
epi.log.post.b: no visible global function definition for 'dbinom'
epi.log.post.b: no visible global function definition for 'dgamma'
epi.log.post.k: no visible global function definition for 'dbinom'
epi.log.post.k: no visible global function definition for 'dgamma'
epistep: no visible global function definition for 'rbinom'
mcmc.bknumu: no visible global function definition for 'runif'
plot.MCepi: no visible global function definition for 'plot'
plot.MCepi: no visible global function definition for 'lines'
plot.epiman: no visible global function definition for 'title'
plot.optvac: no visible global function definition for 'layout'
plot.optvac: no visible global function definition for 'image'
plot.optvac: no visible global function definition for 'heat.colors'
plot.optvac: no visible global function definition for 'grid'
plot.optvac: no visible global function definition for 'text'
plot.optvac: no visible global function definition for 'axis'
plot.optvac: no visible global function definition for 'mtext'
propose: no visible global function definition for 'runif'
propose: no visible global function definition for 'dunif'
Undefined global functions or variables:
  axis box dbinom density dgamma dunif grid heat.colors image layout
  legend lines median mtext par plot points polygon quantile rbeta
  rbinom rgamma rgb runif text title
Consider adding
  importFrom("grDevices", "heat.colors", "rgb")
  importFrom("graphics", "axis", "box", "grid", "image", "layout",
             "legend", "lines", "mtext", "par", "plot", "points",
             "polygon", "text", "title")
  importFrom("stats", "dbinom", "density", "dgamma", "dunif", "median",
             "quantile", "rbeta", "rbinom", "rgamma", "runif")
to your NAMESPACE file.