xds_lines_X_SIRS.Rd
Add lines for the density of infected individuals for the SIRS model
xds_lines_X_SIRS( times, XH, nStrata, clrs = c("darkblue", "darkred", "darkgreen"), llty = 1 )
time points for the observations
a list with the outputs of parse_outputs_X_SIRS
the number of population strata
a vector of colors
an integer (or integers) to set the `lty` for plotting