Add lines for the density of infected individuals for the SEIR model

Add lines for the density of infected individuals for the SEIR model

xde_lines_X_SEIR(
  XH,
  pars,
  clrs = c("black", "darkgreen", "darkred", "darkblue"),
  llty = 1
)

Arguments

XH

a list with the outputs of parse_deout_X_SIS

pars

a list that defines an `ramp.xde` model (*e.g.*, generated by `xde_setup()`)

clrs

a vector of colors

llty

an integer (or integers) to set the `lty` for plotting